diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
index 31797d1faa612..c9716d39590e0 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
@@ -1779,8 +1779,14 @@ public class NotificationPanelViewController extends PanelViewController {
             setQsExpansion((Float) animation.getAnimatedValue());
         });
         animator.addListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationStart(Animator animation) {
+                notifyExpandingStarted();
+            }
+
             @Override
             public void onAnimationEnd(Animator animation) {
+                notifyExpandingFinished();
                 mNotificationStackScroller.resetCheckSnoozeLeavebehind();
                 mQsExpansionAnimator = null;
                 if (onFinishRunnable != null) {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelViewController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelViewController.java
index f7d403f667cbc..81dc9e1cf0e2e 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PanelViewController.java
@@ -157,7 +157,7 @@ public abstract class PanelViewController {
     protected void onExpandingStarted() {
     }
 
-    private void notifyExpandingStarted() {
+    protected void notifyExpandingStarted() {
         if (!mExpanding) {
             mExpanding = true;
             onExpandingStarted();