diff --git a/1.2/HalPolicy.hpp b/1.2/HalPolicy.hpp
index e6001c4..516e1eb 100644
--- a/1.2/HalPolicy.hpp
+++ b/1.2/HalPolicy.hpp
@@ -27,6 +27,10 @@
     using getSupportedOperations_cb = V1_2::IDevice::getSupportedOperations_1_2_cb;
 
     static bool ConvertOperation(const Operation& operation, const Model& model, ConversionData& data);
+
+private:
+    static bool ConvertConv2d(const Operation& operation, const Model& model, ConversionData& data);
+    static bool ConvertDepthwiseConv2d(const Operation& operation, const Model& model, ConversionData& data);
 };
 
 } // namespace hal_1_2