diff --git a/Source/WebCore/accessibility/playstation/AXObjectCachePlayStation.cpp b/Source/WebCore/accessibility/playstation/AXObjectCachePlayStation.cpp
index e954ce8c976d..abc82f930ee2 100644
--- a/Source/WebCore/accessibility/playstation/AXObjectCachePlayStation.cpp
+++ b/Source/WebCore/accessibility/playstation/AXObjectCachePlayStation.cpp
@@ -88,7 +88,7 @@ void AXObjectCache::postPlatformNotification(AccessibilityObject& object, AXNoti
     RefPtr protectedObject = &object;
     switch (notification) {
     case AXNotification::AXSelectedChildrenChanged:
-        protectedObject = notifyChildrenSelectionChange(protectedObject.get());
+        protectedObject = dynamicDowncast<AccessibilityObject>(notifyChildrenSelectionChange(protectedObject.get()));
         break;
     case AXNotification::AXPressDidSucceed:
         notification = checkInteractableObjects(protectedObject.get());