diff --git a/clang/lib/CodeGen/CGCXXABI.cpp b/clang/lib/CodeGen/CGCXXABI.cpp
index 0b441e382f11c2..42e6c916bed0c8 100644
--- a/clang/lib/CodeGen/CGCXXABI.cpp
+++ b/clang/lib/CodeGen/CGCXXABI.cpp
@@ -45,8 +45,7 @@ CGCallee CGCXXABI::EmitLoadOfMemberFunctionPointer(
   ErrorUnsupportedABI(CGF, "calls through member pointers");
 
   ThisPtrForCall = This.getPointer();
-  const FunctionProtoType *FPT =
-    MPT->getPointeeType()->getAs<FunctionProtoType>();
+  const auto *FPT = MPT->getPointeeType()->castAs<FunctionProtoType>();
   const auto *RD =
       cast<CXXRecordDecl>(MPT->getClass()->castAs<RecordType>()->getDecl());
   llvm::FunctionType *FTy = CGM.getTypes().GetFunctionType(