diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index d7f9ec2..063ebf9 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -343,8 +343,7 @@
   llvm::Value *LoadBlockStruct();
 
   llvm::Value *GetAddrOfBlockDecl(const BlockDeclRefExpr *E);
-
-  const llvm::Type *BuildByRefType(QualType Ty, uint64_t Align);
+  const llvm::Type *BuildByRefType(const ValueDecl *D);
 
   void GenerateCode(const FunctionDecl *FD,
                     llvm::Function *Fn);