diff --git a/source/KeyHandlers.js b/source/KeyHandlers.js
index 31905ad..c57fc46 100644
--- a/source/KeyHandlers.js
+++ b/source/KeyHandlers.js
@@ -59,7 +59,8 @@ var onKey = function ( event ) {
 
     if ( this._keyHandlers[ key ] ) {
         this._keyHandlers[ key ]( this, event, range );
-    } else if ( !range.collapsed && ( event.key || key ).length === 1 ) {
+    } else if ( !range.collapsed && !event.ctrlKey && !event.metaKey &&
+            ( event.key || key ).length === 1 ) {
         // Record undo checkpoint.
         this.saveUndoState( range );
         // Delete the selection