diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
index 2d2f2f1..6f93bed 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
@@ -139,6 +139,7 @@
      * @param expandedHeight the new expanded height
      */
     private void updateNotificationStackHeight(float expandedHeight) {
+        mNotificationStackScroller.setIsExpanded(expandedHeight > 0.0f);
         float childOffset = getRelativeTop(mNotificationStackScroller)
                 - mNotificationParent.getTranslationY();
         int newStackHeight = (int) (expandedHeight - childOffset);
@@ -168,4 +169,16 @@
     protected int getDesiredMeasureHeight() {
         return mMaxPanelHeight;
     }
+
+    @Override
+    protected void onExpandingStarted() {
+        super.onExpandingStarted();
+        mNotificationStackScroller.onExpansionStarted();
+    }
+
+    @Override
+    protected void onExpandingFinished() {
+        super.onExpandingFinished();
+        mNotificationStackScroller.onExpansionStopped();
+    }
 }