diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index 81fd387..d6e3394 100644
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -209,7 +209,7 @@
   
   FunctionArgList Args;
   if (FD->getNumParams()) {
-    const FunctionTypeProto* FProto = FD->getType()->getAsFunctionTypeProto();
+    const FunctionProtoType* FProto = FD->getType()->getAsFunctionProtoType();
     assert(FProto && "Function def must have prototype!");
 
     for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i)