diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index f7a5a24..d2d2090 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -10,6 +10,7 @@
     <android.support.design.widget.AppBarLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:id=""
         android:theme="@style/AppTheme.AppBarOverlay">
 
         <android.support.v7.widget.Toolbar