diff --git a/services/core/java/com/android/server/wm/WindowContainer.java b/services/core/java/com/android/server/wm/WindowContainer.java
index d9b25adb8c4cb..2749b11ce6a12 100644
--- a/services/core/java/com/android/server/wm/WindowContainer.java
+++ b/services/core/java/com/android/server/wm/WindowContainer.java
@@ -3773,9 +3773,9 @@ class WindowContainer<E extends WindowContainer> extends ConfigurationContainer<
         // Check if this is changing displays. If so, mark the old display as "ready" for
         // transitions. This is to work around the problem where setting readiness against this
         // container will only set the new display as ready and leave the old display as unready.
-        if (mSyncState != SYNC_STATE_NONE && oldParent != null
-                && oldParent.getDisplayContent() != null && (newParent == null
-                        || oldParent.getDisplayContent() != newParent.getDisplayContent())) {
+        if (mSyncState != SYNC_STATE_NONE && oldParent != null && newParent != null
+                && oldParent.getDisplayContent() != null && newParent.getDisplayContent() != null
+                && oldParent.getDisplayContent() != newParent.getDisplayContent()) {
             mTransitionController.setReady(oldParent.getDisplayContent());
         }