diff --git a/public/javascripts/attachments.js b/public/javascripts/attachments.js
index 01cf5cc15..76203455e 100644
--- a/public/javascripts/attachments.js
+++ b/public/javascripts/attachments.js
@@ -258,7 +258,7 @@ function copyImageFromClipboard(e) {
   if (!$(e.target).hasClass('wiki-edit')) { return; }
   var clipboardData = e.clipboardData || e.originalEvent.clipboardData
   if (!clipboardData) { return; }
-  if (clipboardData.types.some(function(t){ return /^text/.test(t); })) { return; }
+  if (clipboardData.types.some(function(t){ return /^text\/plain$/.test(t); })) { return; }
 
   var items = clipboardData.items
   for (var i = 0 ; i < items.length ; i++) {