diff --git a/quickstep/src/com/android/launcher3/uioverrides/DeviceFlag.java b/quickstep/src/com/android/launcher3/uioverrides/DeviceFlag.java
index 5836ebd..010694b 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/DeviceFlag.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/DeviceFlag.java
@@ -54,6 +54,9 @@
 
     @Override
     public void addChangeListener(Context context, Runnable r) {
+        if (mListeners == null) {
+            initialize(context);
+        }
         mListeners.add(r);
     }