diff --git a/lib/ace/keyboard/emacs.js b/lib/ace/keyboard/emacs.js
index 0c69fc91..a09119ce 100644
--- a/lib/ace/keyboard/emacs.js
+++ b/lib/ace/keyboard/emacs.js
@@ -134,13 +134,15 @@ var $resetMarkMode = function(e) {
     e.editor.session.$emacsMark = null;
 }
 
-var keys = require("../lib/keys").KEY_MODS;
-var eMods = {
-    C: "ctrl", S: "shift", M: "alt"
-};
-["S-C-M", "S-C", "S-M", "C-M", "S", "C", "M"].forEach(function(c) {
+var keys = require("../lib/keys").KEY_MODS,
+    eMods = {C: "ctrl", S: "shift", M: "alt", CMD: "command"},
+    combinations = ["C-S-M-CMD",
+                    "S-M-CMD", "C-M-CMD", "C-S-CMD", "C-S-M",
+                    "M-CMD", "S-CMD", "S-M", "C-CMD", "C-M", "C-S",
+                    "CMD", "M", "S", "C"];
+combinations.forEach(function(c) {
     var hashId = 0;
-    c.split("-").forEach(function(c){
+    c.split("-").forEach(function(c) {
         hashId = hashId | keys[eMods[c]];
     });
     eMods[hashId] = c.toLowerCase() + "-";