diff --git a/compiler/optimizing/parallel_move_test.cc b/compiler/optimizing/parallel_move_test.cc
index 2bdcc61..62629bc 100644
--- a/compiler/optimizing/parallel_move_test.cc
+++ b/compiler/optimizing/parallel_move_test.cc
@@ -50,8 +50,8 @@
              << ")";
   }
 
-  virtual void SpillScratch(int reg) {}
-  virtual void RestoreScratch(int reg) {}
+  virtual void SpillScratch(int reg ATTRIBUTE_UNUSED) {}
+  virtual void RestoreScratch(int reg ATTRIBUTE_UNUSED) {}
 
   std::string GetMessage() const {
     return  message_.str();