diff --git a/1.2/HalPolicy.hpp b/1.2/HalPolicy.hpp
index cd4f2da..b127a63 100644
--- a/1.2/HalPolicy.hpp
+++ b/1.2/HalPolicy.hpp
@@ -6,6 +6,7 @@
 #pragma once
 
 #include "../ConversionUtils.hpp"
+#include "../ConversionUtils_1_2.hpp"
 
 #include <HalInterfaces.h>
 
@@ -29,6 +30,7 @@
     using OperationType             = V1_2::OperationType;
     using ExecutionCallback         = V1_2::IExecutionCallback;
     using getSupportedOperations_cb = V1_2::IDevice::getSupportedOperations_1_2_cb;
+    using ErrorStatus               = V1_0::ErrorStatus;
 
     static bool ConvertOperation(const Operation& operation, const Model& model, ConversionData& data);