diff --git a/components/prism-core.js b/components/prism-core.js
index d69fd99105..1259f23e07 100644
--- a/components/prism-core.js
+++ b/components/prism-core.js
@@ -659,6 +659,9 @@ var Prism = (function (_self) {
 				language: language
 			};
 			_.hooks.run('before-tokenize', env);
+			if (!env.grammar) {
+				throw new Error('The language "' + env.language + '" has no grammar.');
+			}
 			env.tokens = _.tokenize(env.code, env.grammar);
 			_.hooks.run('after-tokenize', env);
 			return Token.stringify(_.util.encode(env.tokens), env.language);
diff --git a/components/prism-core.min.js b/components/prism-core.min.js
index 6aa6722ed1..eedbcf6e25 100644
--- a/components/prism-core.min.js
+++ b/components/prism-core.min.js
@@ -1 +1 @@
-var _self="undefined"!=typeof window?window:"undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?self:{},Prism=function(u){var t=/(?:^|\s)lang(?:uage)?-([\w-]+)(?=\s|$)/i,n=0,e={},M={manual:u.Prism&&u.Prism.manual,disableWorkerMessageHandler:u.Prism&&u.Prism.disableWorkerMessageHandler,util:{encode:function e(n){return n instanceof W?new W(n.type,e(n.content),n.alias):Array.isArray(n)?n.map(e):n.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/\u00a0/g," ")},type:function(e){return Object.prototype.toString.call(e).slice(8,-1)},objId:function(e){return e.__id||Object.defineProperty(e,"__id",{value:++n}),e.__id},clone:function t(e,r){var a,n;switch(r=r||{},M.util.type(e)){case"Object":if(n=M.util.objId(e),r[n])return r[n];for(var i in a={},r[n]=a,e)e.hasOwnProperty(i)&&(a[i]=t(e[i],r));return a;case"Array":return n=M.util.objId(e),r[n]?r[n]:(a=[],r[n]=a,e.forEach(function(e,n){a[n]=t(e,r)}),a);default:return e}},getLanguage:function(e){for(;e;){var 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i=e.parentElement;i&&"pre"===i.nodeName.toLowerCase()&&M.util.setLanguage(i,r);var l={element:e,language:r,grammar:a,code:e.textContent};function o(e){l.highlightedCode=e,M.hooks.run("before-insert",l),l.element.innerHTML=l.highlightedCode,M.hooks.run("after-highlight",l),M.hooks.run("complete",l),t&&t.call(l.element)}if(M.hooks.run("before-sanity-check",l),(i=l.element.parentElement)&&"pre"===i.nodeName.toLowerCase()&&!i.hasAttribute("tabindex")&&i.setAttribute("tabindex","0"),!l.code)return M.hooks.run("complete",l),void(t&&t.call(l.element));if(M.hooks.run("before-highlight",l),l.grammar)if(n&&u.Worker){var s=new Worker(M.filename);s.onmessage=function(e){o(e.data)},s.postMessage(JSON.stringify({language:l.language,code:l.code,immediateClose:!0}))}else o(M.highlight(l.code,l.grammar,l.language));else o(M.util.encode(l.code))},highlight:function(e,n,t){var r={code:e,grammar:n,language:t};return M.hooks.run("before-tokenize",r),r.tokens=M.tokenize(r.code,r.grammar),M.hooks.run("after-tokenize",r),W.stringify(M.util.encode(r.tokens),r.language)},tokenize:function(e,n){var t=n.rest;if(t){for(var r in t)n[r]=t[r];delete n.rest}var a=new i;return I(a,a.head,e),function e(n,t,r,a,i,l){for(var o in r)if(r.hasOwnProperty(o)&&r[o]){var s=r[o];s=Array.isArray(s)?s:[s];for(var u=0;u<s.length;++u){if(l&&l.cause==o+","+u)return;var c=s[u],g=c.inside,f=!!c.lookbehind,h=!!c.greedy,d=c.alias;if(h&&!c.pattern.global){var v=c.pattern.toString().match(/[imsuy]*$/)[0];c.pattern=RegExp(c.pattern.source,v+"g")}for(var p=c.pattern||c,m=a.next,y=i;m!==t.tail&&!(l&&y>=l.reach);y+=m.value.length,m=m.next){var k=m.value;if(t.length>n.length)return;if(!(k instanceof W)){var x,b=1;if(h){if(!(x=z(p,y,n,f))||x.index>=n.length)break;var w=x.index,A=x.index+x[0].length,P=y;for(P+=m.value.length;P<=w;)m=m.next,P+=m.value.length;if(P-=m.value.length,y=P,m.value instanceof W)continue;for(var E=m;E!==t.tail&&(P<A||"string"==typeof E.value);E=E.next)b++,P+=E.value.length;b--,k=n.slice(y,P),x.index-=y}else if(!(x=z(p,0,k,f)))continue;var w=x.index,L=x[0],S=k.slice(0,w),O=k.slice(w+L.length),j=y+k.length;l&&j>l.reach&&(l.reach=j);var C=m.prev;S&&(C=I(t,C,S),y+=S.length),q(t,C,b);var N=new W(o,g?M.tokenize(L,g):L,d,L);if(m=I(t,C,N),O&&I(t,m,O),1<b){var _={cause:o+","+u,reach:j};e(n,t,r,m.prev,y,_),l&&_.reach>l.reach&&(l.reach=_.reach)}}}}}}(e,a,n,a.head,0),function(e){var n=[],t=e.head.next;for(;t!==e.tail;)n.push(t.value),t=t.next;return n}(a)},hooks:{all:{},add:function(e,n){var t=M.hooks.all;t[e]=t[e]||[],t[e].push(n)},run:function(e,n){var t=M.hooks.all[e];if(t&&t.length)for(var r,a=0;r=t[a++];)r(n)}},Token:W};function W(e,n,t,r){this.type=e,this.content=n,this.alias=t,this.length=0|(r||"").length}function z(e,n,t,r){e.lastIndex=n;var a=e.exec(t);if(a&&r&&a[1]){var i=a[1].length;a.index+=i,a[0]=a[0].slice(i)}return a}function i(){var e={value:null,prev:null,next:null},n={value:null,prev:e,next:null};e.next=n,this.head=e,this.tail=n,this.length=0}function I(e,n,t){var r=n.next,a={value:t,prev:n,next:r};return n.next=a,r.prev=a,e.length++,a}function q(e,n,t){for(var r=n.next,a=0;a<t&&r!==e.tail;a++)r=r.next;(n.next=r).prev=n,e.length-=a}if(u.Prism=M,W.stringify=function n(e,t){if("string"==typeof e)return e;if(Array.isArray(e)){var r="";return e.forEach(function(e){r+=n(e,t)}),r}var a={type:e.type,content:n(e.content,t),tag:"span",classes:["token",e.type],attributes:{},language:t},i=e.alias;i&&(Array.isArray(i)?Array.prototype.push.apply(a.classes,i):a.classes.push(i)),M.hooks.run("wrap",a);var l="";for(var o in a.attributes)l+=" "+o+'="'+(a.attributes[o]||"").replace(/"/g,"&quot;")+'"';return"<"+a.tag+' class="'+a.classes.join(" ")+'"'+l+">"+a.content+"</"+a.tag+">"},!u.document)return u.addEventListener&&(M.disableWorkerMessageHandler||u.addEventListener("message",function(e){var n=JSON.parse(e.data),t=n.language,r=n.code,a=n.immediateClose;u.postMessage(M.highlight(r,M.languages[t],t)),a&&u.close()},!1)),M;var r=M.util.currentScript();function a(){M.manual||M.highlightAll()}if(r&&(M.filename=r.src,r.hasAttribute("data-manual")&&(M.manual=!0)),!M.manual){var l=document.readyState;"loading"===l||"interactive"===l&&r&&r.defer?document.addEventListener("DOMContentLoaded",a):window.requestAnimationFrame?window.requestAnimationFrame(a):window.setTimeout(a,16)}return M}(_self);"undefined"!=typeof module&&module.exports&&(module.exports=Prism),"undefined"!=typeof global&&(global.Prism=Prism);
\ No newline at end of file
+var _self="undefined"!=typeof window?window:"undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?self:{},Prism=function(u){var t=/(?:^|\s)lang(?:uage)?-([\w-]+)(?=\s|$)/i,n=0,e={},M={manual:u.Prism&&u.Prism.manual,disableWorkerMessageHandler:u.Prism&&u.Prism.disableWorkerMessageHandler,util:{encode:function e(n){return n instanceof W?new W(n.type,e(n.content),n.alias):Array.isArray(n)?n.map(e):n.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/\u00a0/g," ")},type:function(e){return Object.prototype.toString.call(e).slice(8,-1)},objId:function(e){return e.__id||Object.defineProperty(e,"__id",{value:++n}),e.__id},clone:function t(e,r){var a,n;switch(r=r||{},M.util.type(e)){case"Object":if(n=M.util.objId(e),r[n])return r[n];for(var i in a={},r[n]=a,e)e.hasOwnProperty(i)&&(a[i]=t(e[i],r));return a;case"Array":return n=M.util.objId(e),r[n]?r[n]:(a=[],r[n]=a,e.forEach(function(e,n){a[n]=t(e,r)}),a);default:return e}},getLanguage:function(e){for(;e;){var 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i=e.parentElement;i&&"pre"===i.nodeName.toLowerCase()&&M.util.setLanguage(i,r);var l={element:e,language:r,grammar:a,code:e.textContent};function o(e){l.highlightedCode=e,M.hooks.run("before-insert",l),l.element.innerHTML=l.highlightedCode,M.hooks.run("after-highlight",l),M.hooks.run("complete",l),t&&t.call(l.element)}if(M.hooks.run("before-sanity-check",l),(i=l.element.parentElement)&&"pre"===i.nodeName.toLowerCase()&&!i.hasAttribute("tabindex")&&i.setAttribute("tabindex","0"),!l.code)return M.hooks.run("complete",l),void(t&&t.call(l.element));if(M.hooks.run("before-highlight",l),l.grammar)if(n&&u.Worker){var s=new Worker(M.filename);s.onmessage=function(e){o(e.data)},s.postMessage(JSON.stringify({language:l.language,code:l.code,immediateClose:!0}))}else o(M.highlight(l.code,l.grammar,l.language));else o(M.util.encode(l.code))},highlight:function(e,n,t){var r={code:e,grammar:n,language:t};if(M.hooks.run("before-tokenize",r),!r.grammar)throw new Error('The language "'+r.language+'" has 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e={value:null,prev:null,next:null},n={value:null,prev:e,next:null};e.next=n,this.head=e,this.tail=n,this.length=0}function I(e,n,t){var r=n.next,a={value:t,prev:n,next:r};return n.next=a,r.prev=a,e.length++,a}function T(e,n,t){for(var r=n.next,a=0;a<t&&r!==e.tail;a++)r=r.next;(n.next=r).prev=n,e.length-=a}if(u.Prism=M,W.stringify=function n(e,t){if("string"==typeof e)return e;if(Array.isArray(e)){var r="";return e.forEach(function(e){r+=n(e,t)}),r}var a={type:e.type,content:n(e.content,t),tag:"span",classes:["token",e.type],attributes:{},language:t},i=e.alias;i&&(Array.isArray(i)?Array.prototype.push.apply(a.classes,i):a.classes.push(i)),M.hooks.run("wrap",a);var l="";for(var o in a.attributes)l+=" "+o+'="'+(a.attributes[o]||"").replace(/"/g,"&quot;")+'"';return"<"+a.tag+' class="'+a.classes.join(" ")+'"'+l+">"+a.content+"</"+a.tag+">"},!u.document)return u.addEventListener&&(M.disableWorkerMessageHandler||u.addEventListener("message",function(e){var n=JSON.parse(e.data),t=n.language,r=n.code,a=n.immediateClose;u.postMessage(M.highlight(r,M.languages[t],t)),a&&u.close()},!1)),M;var r=M.util.currentScript();function a(){M.manual||M.highlightAll()}if(r&&(M.filename=r.src,r.hasAttribute("data-manual")&&(M.manual=!0)),!M.manual){var l=document.readyState;"loading"===l||"interactive"===l&&r&&r.defer?document.addEventListener("DOMContentLoaded",a):window.requestAnimationFrame?window.requestAnimationFrame(a):window.setTimeout(a,16)}return M}(_self);"undefined"!=typeof module&&module.exports&&(module.exports=Prism),"undefined"!=typeof global&&(global.Prism=Prism);
\ No newline at end of file
diff --git a/docs/Prism.hooks.html b/docs/Prism.hooks.html
index 8b88b4a96b..0bc18a03c9 100644
--- a/docs/Prism.hooks.html
+++ b/docs/Prism.hooks.html
@@ -73,7 +73,7 @@ <h2>
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line714">line 714</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line717">line 717</a>
     </li></ul></dd>
     
 
@@ -152,7 +152,7 @@ <h4 class="name" id=".add"><span class="type-signature">(static) </span>add<span
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line729">line 729</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line732">line 732</a>
     </li></ul></dd>
     
 
@@ -314,7 +314,7 @@ <h4 class="name" id=".run"><span class="type-signature">(static) </span>run<span
     
     <dt class="tag-source">Source:</dt>
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-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line746">line 746</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line749">line 749</a>
     </li></ul></dd>
     
 
diff --git a/docs/Prism.html b/docs/Prism.html
index e27a9e1e7f..73efd742d1 100644
--- a/docs/Prism.html
+++ b/docs/Prism.html
@@ -1244,7 +1244,7 @@ <h4 class="name" id=".tokenize"><span class="type-signature">(static) </span>tok
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line691">line 691</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line694">line 694</a>
     </li></ul></dd>
     
 
diff --git a/docs/Token.html b/docs/Token.html
index fceef025e6..f35d4b397f 100644
--- a/docs/Token.html
+++ b/docs/Token.html
@@ -80,7 +80,7 @@ <h4 class="name" id="Token"><span class="type-signature"></span>new Token<span c
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line780">line 780</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line783">line 783</a>
     </li></ul></dd>
     
 
@@ -364,7 +364,7 @@ <h4 class="name" id="alias"><span class="type-signature"></span>alias<span class
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line807">line 807</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line810">line 810</a>
     </li></ul></dd>
     
 
@@ -447,7 +447,7 @@ <h4 class="name" id="content"><span class="type-signature"></span>content<span c
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line799">line 799</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line802">line 802</a>
     </li></ul></dd>
     
 
@@ -524,7 +524,7 @@ <h4 class="name" id="type"><span class="type-signature"></span>type<span class="
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line790">line 790</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line793">line 793</a>
     </li></ul></dd>
     
 
diff --git a/docs/global.html b/docs/global.html
index e4a62cd7ee..69c177f9b2 100644
--- a/docs/global.html
+++ b/docs/global.html
@@ -143,7 +143,7 @@ <h4 class="name" id="Grammar">Grammar</h4>
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line1236">line 1236</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line1239">line 1239</a>
     </li></ul></dd>
     
 
@@ -274,7 +274,7 @@ <h4 class="name" id="GrammarToken">GrammarToken</h4>
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line1215">line 1215</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line1218">line 1218</a>
     </li></ul></dd>
     
 
@@ -559,7 +559,7 @@ <h4 class="name" id="HighlightCallback"><span class="type-signature"></span>High
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line1244">line 1244</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line1247">line 1247</a>
     </li></ul></dd>
     
 
@@ -713,7 +713,7 @@ <h4 class="name" id="HookCallback"><span class="type-signature"></span>HookCallb
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line1254">line 1254</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line1257">line 1257</a>
     </li></ul></dd>
     
 
@@ -859,7 +859,7 @@ <h4 class="name" id="TokenStream">TokenStream</h4>
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line812">line 812</a>
+        <a href="prism-core.js.html">prism-core.js</a>, <a href="prism-core.js.html#line815">line 815</a>
     </li></ul></dd>
     
 
diff --git a/docs/prism-core.js.html b/docs/prism-core.js.html
index c1e9c99d5e..c895242f5b 100644
--- a/docs/prism-core.js.html
+++ b/docs/prism-core.js.html
@@ -712,6 +712,9 @@ <h1 class="page-title">prism-core.js</h1>
 				language: language
 			};
 			_.hooks.run('before-tokenize', env);
+			if (!env.grammar) {
+				throw new Error('The language "' + env.language + '" has no grammar.');
+			}
 			env.tokens = _.tokenize(env.code, env.grammar);
 			_.hooks.run('after-tokenize', env);
 			return Token.stringify(_.util.encode(env.tokens), env.language);
diff --git a/prism.js b/prism.js
index 7d2bc604f4..04e9a28e61 100644
--- a/prism.js
+++ b/prism.js
@@ -664,6 +664,9 @@ var Prism = (function (_self) {
 				language: language
 			};
 			_.hooks.run('before-tokenize', env);
+			if (!env.grammar) {
+				throw new Error('The language "' + env.language + '" has no grammar.');
+			}
 			env.tokens = _.tokenize(env.code, env.grammar);
 			_.hooks.run('after-tokenize', env);
 			return Token.stringify(_.util.encode(env.tokens), env.language);