diff --git a/clang/lib/CodeGen/Targets/X86.cpp b/clang/lib/CodeGen/Targets/X86.cpp
index 43dadf5e724ac6..433ceaa76c8478 100644
--- a/clang/lib/CodeGen/Targets/X86.cpp
+++ b/clang/lib/CodeGen/Targets/X86.cpp
@@ -2834,7 +2834,7 @@ ABIArgInfo
 X86_64ABIInfo::classifyRegCallStructTypeImpl(QualType Ty, unsigned &NeededInt,
                                              unsigned &NeededSSE,
                                              unsigned &MaxVectorWidth) const {
-  auto RT = Ty->getAs<RecordType>();
+  auto RT = Ty->castAs<RecordType>();
   assert(RT && "classifyRegCallStructType only valid with struct types");
 
   if (RT->getDecl()->hasFlexibleArrayMember())