diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp
index c899d7d1f3d..67a598cf232 100644
--- a/lib/VMCore/ConstantFold.cpp
+++ b/lib/VMCore/ConstantFold.cpp
@@ -30,7 +30,7 @@ class TemplateRules : public ConstRules {
   // Redirecting functions that cast to the appropriate types
   //===--------------------------------------------------------------------===//
 
-  virtual ConstPoolVal *not(const ConstPoolVal *V) const {
+  virtual ConstPoolVal *op_not(const ConstPoolVal *V) const {
     return SubClassName::Not((const ArgType *)V);
   }