diff --git a/runtime/handle_scope.h b/runtime/handle_scope.h
index c55835d..2c4f0f9 100644
--- a/runtime/handle_scope.h
+++ b/runtime/handle_scope.h
@@ -100,7 +100,7 @@
   }
 
   // Offset of link within HandleScope, used by generated code.
-  static size_t LinkOffset(size_t pointer_size) {
+  static size_t LinkOffset(size_t pointer_size ATTRIBUTE_UNUSED) {
     return 0;
   }