diff --git a/src/map.rs b/src/map.rs
index 1628cbd..1239571 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -327,7 +327,7 @@ matcher_map!(
     ),
     (
         MatcherType::DOC,
-        "application/application/vnd.openxmlformats-officedocument.presentationml.presentation",
+        "application/vnd.openxmlformats-officedocument.presentationml.presentation",
         "pptx",
         matchers::doc::is_pptx
     ),
diff --git a/tests/doc.rs b/tests/doc.rs
index d0fc599..a8f5c8c 100644
--- a/tests/doc.rs
+++ b/tests/doc.rs
@@ -20,7 +20,7 @@ test_format!(
 
 test_format!(
     DOC,
-    "application/application/vnd.openxmlformats-officedocument.presentationml.presentation",
+    "application/vnd.openxmlformats-officedocument.presentationml.presentation",
     "pptx",
     pptx,
     "sample.pptx"