diff --git a/webcompat/static/js/lib/bugform.js b/webcompat/static/js/lib/bugform.js
index bc02e1e2b..6e60da1b1 100644
--- a/webcompat/static/js/lib/bugform.js
+++ b/webcompat/static/js/lib/bugform.js
@@ -605,6 +605,8 @@ BugForm.prototype.hideLoadingIndicator = function() {
 };
 
 BugForm.prototype.onFormSubmit = function(event) {
+  event.preventDefault();
+  this.disableSubmits();
   this.showLoadingIndicator();
   this.maybeUploadImage(event).then(
     this.submitForm.bind(this),
diff --git a/webcompat/static/js/lib/issue-wizard-bugform.js b/webcompat/static/js/lib/issue-wizard-bugform.js
index 5aec83c16..6433e17a6 100644
--- a/webcompat/static/js/lib/issue-wizard-bugform.js
+++ b/webcompat/static/js/lib/issue-wizard-bugform.js
@@ -1152,6 +1152,8 @@ BugForm.prototype.hideLoadingIndicator = function() {
 };
 
 BugForm.prototype.onFormSubmit = function(event) {
+  event.preventDefault();
+  this.disableSubmits();
   this.showLoadingIndicator();
   this.maybeUploadImage(event).then(
     this.submitForm.bind(this),