diff --git a/cocos/renderer/backend/ProgramState.cpp b/cocos/renderer/backend/ProgramState.cpp
index 3025a73562..5ca55bc4ec 100644
--- a/cocos/renderer/backend/ProgramState.cpp
+++ b/cocos/renderer/backend/ProgramState.cpp
@@ -3,7 +3,9 @@
 #include "renderer/backend/Program.h"
 #include "renderer/backend/Texture.h"
 #include "renderer/backend/Types.h"
+#ifdef CC_USE_METAL
 #include "glsl_optimizer.h"
+#endif
 
 CC_BACKEND_BEGIN
 
@@ -245,6 +247,7 @@ void ProgramState::setUniform(const backend::UniformLocation& uniformLocation, c
     }
 }
 
+#ifdef CC_USE_METAL
 void ProgramState::convertUniformData(const backend::UniformInfo& uniformInfo, const void* srcData, uint32_t srcSize, std::vector<char>& uniformData)
 {
     auto basicType = static_cast<glslopt_basic_type>(uniformInfo.type);
@@ -309,6 +312,7 @@ void ProgramState::convertUniformData(const backend::UniformInfo& uniformInfo, c
     uniformData.assign(convertedData, convertedData + uniformInfo.bufferSize);
     CC_SAFE_DELETE_ARRAY(convertedData);
 }
+#endif
 
 void ProgramState::setVertexUniform(int location, const void* data, uint32_t size)
 {
diff --git a/cocos/renderer/backend/ProgramState.h b/cocos/renderer/backend/ProgramState.h
index 738dfc0e6c..fda01ee8dc 100644
--- a/cocos/renderer/backend/ProgramState.h
+++ b/cocos/renderer/backend/ProgramState.h
@@ -84,8 +84,10 @@ protected:
     void setTexture(int location, uint32_t slot, backend::Texture* texture, std::unordered_map<int, TextureInfo>& textureInfo);
     void setTextureArray(int location, const std::vector<uint32_t>& slots, const std::vector<backend::Texture*> textures, std::unordered_map<int, TextureInfo>& textureInfo);
     
+#ifdef CC_USE_METAL
     //float3 etc in Metal has both sizeof and alignment same as float4, convert it before fill into uniform buffer
     void convertUniformData(const backend::UniformInfo& uniformInfo, const void* srcData, uint32_t srcSize, std::vector<char>& uniformData);
+#endif
     
     backend::Program* _program = nullptr;
     std::vector<UniformBuffer> _vertexUniformInfos;