diff --git a/cocos/base/CCDirector.cpp b/cocos/base/CCDirector.cpp
index a09d56b4ed..1761ca311a 100644
--- a/cocos/base/CCDirector.cpp
+++ b/cocos/base/CCDirector.cpp
@@ -677,8 +677,8 @@ static void GLToClipTransform(Mat4 *transformOut)
     Director* director = Director::getInstance();
     CCASSERT(nullptr != director, "Director is null when setting matrix stack");
 
-    auto projection = director->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION);
-    auto modelview = director->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
+    auto& projection = director->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION);
+    auto& modelview = director->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
     *transformOut = projection * modelview;
 }