diff --git a/neuralnetworks/aidl/utils/include/nnapi/hal/aidl/Utils.h b/neuralnetworks/aidl/utils/include/nnapi/hal/aidl/Utils.h
index beca38b..7ed5437 100644
--- a/neuralnetworks/aidl/utils/include/nnapi/hal/aidl/Utils.h
+++ b/neuralnetworks/aidl/utils/include/nnapi/hal/aidl/Utils.h
@@ -26,6 +26,8 @@
 #include <nnapi/Types.h>
 #include <nnapi/Validation.h>
 
+#include <type_traits>
+
 namespace aidl::android::hardware::neuralnetworks::utils {
 
 constexpr auto kDefaultPriority = Priority::MEDIUM;
@@ -80,6 +82,11 @@
     return convert(NN_TRY(nn::convert(nonCanonicalObject)));
 }
 
+template <typename Type>
+constexpr std::underlying_type_t<Type> underlyingType(Type value) {
+    return static_cast<std::underlying_type_t<Type>>(value);
+}
+
 nn::GeneralResult<Memory> clone(const Memory& memory);
 nn::GeneralResult<Request> clone(const Request& request);
 nn::GeneralResult<RequestMemoryPool> clone(const RequestMemoryPool& requestPool);
diff --git a/neuralnetworks/aidl/utils/src/Conversions.cpp b/neuralnetworks/aidl/utils/src/Conversions.cpp
index 83fda10..081e3d7 100644
--- a/neuralnetworks/aidl/utils/src/Conversions.cpp
+++ b/neuralnetworks/aidl/utils/src/Conversions.cpp
@@ -57,10 +57,6 @@
     while (UNLIKELY(value > std::numeric_limits<int32_t>::max())) return NN_ERROR()
 
 namespace {
-template <typename Type>
-constexpr std::underlying_type_t<Type> underlyingType(Type value) {
-    return static_cast<std::underlying_type_t<Type>>(value);
-}
 
 constexpr int64_t kNoTiming = -1;
 
@@ -70,6 +66,7 @@
 namespace {
 
 using ::aidl::android::hardware::common::NativeHandle;
+using ::aidl::android::hardware::neuralnetworks::utils::underlyingType;
 
 template <typename Input>
 using UnvalidatedConvertOutput =
@@ -404,7 +401,7 @@
 #endif  // __ANDROID__
         }
     }
-    return NN_ERROR() << "Unrecognized Memory::Tag: " << memory.getTag();
+    return NN_ERROR() << "Unrecognized Memory::Tag: " << underlyingType(memory.getTag());
 }
 
 GeneralResult<Timing> unvalidatedConvert(const aidl_hal::Timing& timing) {
diff --git a/neuralnetworks/aidl/utils/src/Utils.cpp b/neuralnetworks/aidl/utils/src/Utils.cpp
index 03407be..76a0b07 100644
--- a/neuralnetworks/aidl/utils/src/Utils.cpp
+++ b/neuralnetworks/aidl/utils/src/Utils.cpp
@@ -88,7 +88,7 @@
             return Memory::make<Memory::Tag::hardwareBuffer>(std::move(handle));
         }
     }
-    return (NN_ERROR() << "Unrecognized Memory::Tag: " << memory.getTag())
+    return (NN_ERROR() << "Unrecognized Memory::Tag: " << underlyingType(memory.getTag()))
             .
             operator nn::GeneralResult<Memory>();
 }
@@ -103,7 +103,7 @@
     }
     // Using explicit type conversion because std::variant inside the RequestMemoryPool confuses the
     // compiler.
-    return (NN_ERROR() << "Unrecognized request pool tag: " << requestPool.getTag())
+    return (NN_ERROR() << "Unrecognized request pool tag: " << underlyingType(requestPool.getTag()))
             .
             operator nn::GeneralResult<RequestMemoryPool>();
 }