diff --git a/src/frontend/arm_types.h b/src/frontend/arm_types.h
index e37c542b..dc68482b 100644
--- a/src/frontend/arm_types.h
+++ b/src/frontend/arm_types.h
@@ -128,7 +128,7 @@ private:
 
 struct LocationDescriptorHash {
     size_t operator()(const LocationDescriptor& x) const {
-        return std::hash<u64>()(x.UniqueHash());
+        return static_cast<size_t>(x.UniqueHash());
     }
 };