diff --git a/1.0/ArmnnDriver.hpp b/1.0/ArmnnDriver.hpp
index 52c34c4..035d448 100644
--- a/1.0/ArmnnDriver.hpp
+++ b/1.0/ArmnnDriver.hpp
@@ -47,7 +47,7 @@
     }
 
     Return<ErrorStatus> prepareModel(const V1_0::Model& model,
-                                     const android::sp<IPreparedModelCallback>& cb) override
+                                     const android::sp<V1_0::IPreparedModelCallback>& cb) override
     {
         ALOGV("hal_1_0::ArmnnDriver::prepareModel()");
 
diff --git a/1.0/HalPolicy.hpp b/1.0/HalPolicy.hpp
index 484a99b..bbdf630 100644
--- a/1.0/HalPolicy.hpp
+++ b/1.0/HalPolicy.hpp
@@ -20,6 +20,8 @@
 {
 public:
     using Model                     = V1_0::Model;
+    using Operand                   = V1_0::Operand;
+    using OperandType               = V1_0::OperandType;
     using Operation                 = V1_0::Operation;
     using OperationType             = V1_0::OperationType;
     using getSupportedOperations_cb = V1_0::IDevice::getSupportedOperations_cb;