diff --git a/lib/ace/keyboard/state_handler.js b/lib/ace/keyboard/state_handler.js
index fd443acd..f0c2face 100644
--- a/lib/ace/keyboard/state_handler.js
+++ b/lib/ace/keyboard/state_handler.js
@@ -64,7 +64,8 @@ StateHandler.prototype = {
             if (binding.key) {
                 binding.key = new RegExp('^' + binding.key + '$');
             } else if (Array.isArray(binding.regex)) {
-                binding.key = new RegExp('^' + binding.regex[1] + '$');
+                if (!('key' in binding))
+                  binding.key = new RegExp('^' + binding.regex[1] + '$');
                 binding.regex = new RegExp(binding.regex.join('') + '$');
             } else if (binding.regex) {
                 binding.regex = new RegExp(binding.regex + '$');