diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 6f20c6a..3126635 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -10414,8 +10414,7 @@
         FD->setInvalidDecl();
       } else {
         // Substitute 'void' for the 'auto' in the type.
-        TypeLoc ResultType = FD->getTypeSourceInfo()->getTypeLoc().
-            IgnoreParens().castAs<FunctionProtoTypeLoc>().getReturnLoc();
+        TypeLoc ResultType = getReturnTypeLoc(FD);
         Context.adjustDeducedFunctionResultType(
             FD, SubstAutoType(ResultType.getType(), Context.VoidTy));
       }