diff --git a/src/angular.prefix b/src/angular.prefix
index be874795..b9ccc3fb 100644
--- a/src/angular.prefix
+++ b/src/angular.prefix
@@ -21,4 +21,4 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-(function(window, document){
+(function(window, document, undefined){