diff --git a/compiler/optimizing/graph_checker.h b/compiler/optimizing/graph_checker.h
index 5ec3003..89fea0a 100644
--- a/compiler/optimizing/graph_checker.h
+++ b/compiler/optimizing/graph_checker.h
@@ -107,6 +107,7 @@
   void VisitBinaryOperation(HBinaryOperation* op) OVERRIDE;
   void VisitCondition(HCondition* op) OVERRIDE;
   void VisitIf(HIf* instruction) OVERRIDE;
+  void VisitConstant(HConstant* instruction) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SSAChecker);