diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index 539e0b5..4bca9aa 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -253,7 +253,7 @@
                               ArenaBitVector* visited,
                               ArenaBitVector* visiting);
   void RemoveInstructionsAsUsersFromDeadBlocks(const ArenaBitVector& visited) const;
-  void RemoveDeadBlocks(const ArenaBitVector& visited) const;
+  void RemoveDeadBlocks(const ArenaBitVector& visited);
 
   template <class InstType, typename ValueType>
   InstType* CreateConstant(ValueType value, ArenaSafeMap<ValueType, InstType*>* cache);