diff --git a/services/core/java/com/android/server/wm/PinnedStackController.java b/services/core/java/com/android/server/wm/PinnedStackController.java
index 01a50b7..0ad4e0a 100644
--- a/services/core/java/com/android/server/wm/PinnedStackController.java
+++ b/services/core/java/com/android/server/wm/PinnedStackController.java
@@ -135,7 +135,7 @@
         mService = service;
         mDisplayContent = displayContent;
         mSnapAlgorithm = new PipSnapAlgorithm(service.mContext);
-        mMotionHelper = new PipMotionHelper(BackgroundThread.getHandler());
+        mMotionHelper = new PipMotionHelper(UiThread.getHandler());
         mDisplayInfo.copyFrom(mDisplayContent.getDisplayInfo());
         reloadResources();
     }