diff --git a/cocos/renderer/CCMaterial.cpp b/cocos/renderer/CCMaterial.cpp
index 9ff10ac6b4..2bd87a6a36 100644
--- a/cocos/renderer/CCMaterial.cpp
+++ b/cocos/renderer/CCMaterial.cpp
@@ -442,9 +442,9 @@ Material* Material::clone() const
         for (const auto& technique: _techniques)
         {
             auto t = technique->clone();
-            t->setParent(material);
+            t->_parent = material;
             for (ssize_t i = 0; i < t->getPassCount(); i++) {
-                t->getPassByIndex(i)->setParent(t);
+                t->getPassByIndex(i)->_parent = t;
             }
             material->_techniques.pushBack(t);
         }
diff --git a/cocos/renderer/CCRenderState.h b/cocos/renderer/CCRenderState.h
index c30b3710ab..c26cd3bc48 100644
--- a/cocos/renderer/CCRenderState.h
+++ b/cocos/renderer/CCRenderState.h
@@ -84,12 +84,6 @@ public:
      * Returns the topmost RenderState in the hierarchy below the given RenderState.
      */
     RenderState* getTopmost(RenderState* below);
-    
-    /**
-     * Set parent RenderState
-     * @param parent Parent RenderState
-     */
-    void setParent(RenderState* parent) { _parent = parent; }
 
     enum Blend
     {