diff --git a/src/xterm.js b/src/xterm.js
index 7bd6e5b4..d88ddf49 100644
--- a/src/xterm.js
+++ b/src/xterm.js
@@ -4953,8 +4953,12 @@
           (term.isMac && ev.altKey && !ev.ctrlKey && !ev.metaKey) ||
           (term.isMSWindows && ev.altKey && ev.ctrlKey && !ev.metaKey);
 
+    	if (ev.type == 'keypress') {
+        return thirdLevelKey;
+      }
+
       // Don't invoke for arrows, pageDown, home, backspace, etc. (on non-keypress events)
-      return thirdLevelKey && ((ev.type != 'keypress') ? (!ev.keyCode || ev.keyCode > 47) : true);
+      return thirdLevelKey && (!ev.keyCode || ev.keyCode > 47);
     }
 
     function matchColor(r1, g1, b1) {