diff --git a/lib/index.js b/lib/index.js
index de59aff..032a993 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -5,11 +5,13 @@ app = angular.module('focusOn', []);
 
 app.directive('focusOn', function() {
   return function(scope, elem, attr) {
-    return scope.$on('focusOn', function(e, name) {
-      if (name === attr.focusOn) {
-        return elem[0].focus();
-      }
-    });
+    if(attr.focusOn){
+      return scope.$on('focusOn', function(e, name) {
+        if (name === attr.focusOn) {
+          return elem[0].focus();
+        }
+      });
+    }
   };
 });