diff --git a/compiler/optimizing/graph_checker.h b/compiler/optimizing/graph_checker.h
index 89fea0a..4568a5e 100644
--- a/compiler/optimizing/graph_checker.h
+++ b/compiler/optimizing/graph_checker.h
@@ -107,8 +107,11 @@
   void VisitBinaryOperation(HBinaryOperation* op) OVERRIDE;
   void VisitCondition(HCondition* op) OVERRIDE;
   void VisitIf(HIf* instruction) OVERRIDE;
+  void VisitBooleanNot(HBooleanNot* instruction) OVERRIDE;
   void VisitConstant(HConstant* instruction) OVERRIDE;
 
+  void HandleBooleanInput(HInstruction* instruction, size_t input_index);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(SSAChecker);
 };