diff --git a/lib/Transforms/IPO/ArgumentPromotion.cpp b/lib/Transforms/IPO/ArgumentPromotion.cpp
index d7f122b564c..230bafd6f0f 100644
--- a/lib/Transforms/IPO/ArgumentPromotion.cpp
+++ b/lib/Transforms/IPO/ArgumentPromotion.cpp
@@ -480,6 +480,7 @@ Function *ArgPromotion::DoPromotion(Function *F,
   if (F->hasCollector())
     NF->setCollector(F->getCollector());
   F->getParent()->getFunctionList().insert(F, NF);
+  NF->takeName(F);
 
   // Get the alias analysis information that we need to update to reflect our
   // changes.