diff --git a/lib/Rewrite/RewriteRope.cpp b/lib/Rewrite/RewriteRope.cpp
index e290921..cfedd4b 100644
--- a/lib/Rewrite/RewriteRope.cpp
+++ b/lib/Rewrite/RewriteRope.cpp
@@ -119,7 +119,7 @@
     /// guaranteed that there is a split at Offset.
     void erase(unsigned Offset, unsigned NumBytes);
 
-    static inline bool classof(const RopePieceBTreeNode *) { return true; }
+    //static inline bool classof(const RopePieceBTreeNode *) { return true; }
 
   };
 } // end anonymous namespace
@@ -223,7 +223,7 @@
     /// guaranteed that there is a split at Offset.
     void erase(unsigned Offset, unsigned NumBytes);
 
-    static inline bool classof(const RopePieceBTreeLeaf *) { return true; }
+    //static inline bool classof(const RopePieceBTreeLeaf *) { return true; }
     static inline bool classof(const RopePieceBTreeNode *N) {
       return N->isLeaf();
     }
@@ -455,7 +455,7 @@
     /// guaranteed that there is a split at Offset.
     void erase(unsigned Offset, unsigned NumBytes);
 
-    static inline bool classof(const RopePieceBTreeInterior *) { return true; }
+    //static inline bool classof(const RopePieceBTreeInterior *) { return true; }
     static inline bool classof(const RopePieceBTreeNode *N) {
       return !N->isLeaf();
     }