diff --git a/src/static/js/ace2_inner.js b/src/static/js/ace2_inner.js
index bcb30623f..e2e1128c7 100644
--- a/src/static/js/ace2_inner.js
+++ b/src/static/js/ace2_inner.js
@@ -3889,7 +3889,7 @@ function Ace2Inner(){
           toggleAttributeOnSelection('underline');
           specialHandled = true;
         }
-       if ((!specialHandled) && isTypeForCmdKey && String.fromCharCode(which).toLowerCase() == "5" && (evt.metaKey || evt.ctrlKey))
+        if ((!specialHandled) && isTypeForCmdKey && String.fromCharCode(which).toLowerCase() == "5" && (evt.metaKey || evt.ctrlKey) && evt.altKey !== true)
         {
           // cmd-5 (strikethrough)
           fastIncorp(13);