diff --git a/frameworks/core/components_ng/manager/full_screen/full_screen_manager.cpp b/frameworks/core/components_ng/manager/full_screen/full_screen_manager.cpp
index 074cc30e6f3dc228670d7e486541f94df298f310..4fdac37c0777591e1a18ef99fff0efa8d430e904 100644
--- a/frameworks/core/components_ng/manager/full_screen/full_screen_manager.cpp
+++ b/frameworks/core/components_ng/manager/full_screen/full_screen_manager.cpp
@@ -34,6 +34,7 @@ void FullScreenManager::RequestFullScreen(const RefPtr<FrameNode>& frameNode)
         return;
     }
     frameNode->MountToParent(rootNode);
+    CHECK_NULL_VOID(parentNode);
     auto slot = parentNode->RemoveChildAndReturnIndex(frameNode);
     auto resultForParent = originalParent_.try_emplace(nodeId, parentNode, slot);
     if (!resultForParent.second) {