diff --git a/keymaster.js b/keymaster.js
index 8f5b5fc..37dfb88 100644
--- a/keymaster.js
+++ b/keymaster.js
@@ -176,9 +176,9 @@
 
       if (keys.length > 1) {
         mods = getMods(keys);
+        key = keys[keys.length - 1];
       }
 
-      key = keys[keys.length - 1];
       key = code(key);
 
       if (scope === undefined) {
@@ -263,12 +263,15 @@
       object.attachEvent('on'+event, function(){ method(window.event) });
   };
 
-  // set the handlers globally on document
-  addEvent(document, 'keydown', function(event) { dispatch(event) }); // Passing _scope to a callback to ensure it remains the same by execution. Fixes #48
-  addEvent(document, 'keyup', clearModifier);
 
-  // reset modifiers to false whenever the window is (re)focused.
-  addEvent(window, 'focus', resetModifiers);
+  if(typeof document !== 'undefined'){
+    // set the handlers globally on document
+    addEvent(document, 'keydown', function(event) { dispatch(event) }); // Passing _scope to a callback to ensure it remains the same by execution. Fixes #48
+    addEvent(document, 'keyup', clearModifier);
+
+    // reset modifiers to false whenever the window is (re)focused.
+    addEvent(window, 'focus', resetModifiers);
+  }
 
   // store previously defined key
   var previousKey = global.key;