diff --git a/1.1/HalPolicy.hpp b/1.1/HalPolicy.hpp
index 806686b..18bb705 100644
--- a/1.1/HalPolicy.hpp
+++ b/1.1/HalPolicy.hpp
@@ -26,6 +26,7 @@
     using Operation                 = V1_1::Operation;
     using OperationType             = V1_1::OperationType;
     using getSupportedOperations_cb = V1_1::IDevice::getSupportedOperations_1_1_cb;
+    using ErrorStatus               = V1_0::ErrorStatus;
 
     static bool ConvertOperation(const Operation& operation, const Model& model, ConversionData& data);