diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index c8c4d33..58ae3ac 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -7068,8 +7068,8 @@
   // __null is usually wrapped in a macro.  Go up a macro if that is the case.
   if (NullKind == Expr::NPCK_GNUNull) {
     if (Loc.isMacroID()) {
-      StringRef MacroName =
-          Lexer::getImmediateMacroName(Loc, S.SourceMgr, S.getLangOpts());
+      StringRef MacroName = Lexer::getImmediateMacroNameForDiagnostics(
+          Loc, S.SourceMgr, S.getLangOpts());
       if (MacroName == "NULL")
         Loc = S.SourceMgr.getImmediateExpansionRange(Loc).first;
     }