diff --git a/clang/utils/TableGen/SveEmitter.cpp b/clang/utils/TableGen/SveEmitter.cpp
index 4f8419b78eb7d..2ab7d7372a2a8 100644
--- a/clang/utils/TableGen/SveEmitter.cpp
+++ b/clang/utils/TableGen/SveEmitter.cpp
@@ -1282,6 +1282,8 @@ void SVEEmitter::createHeader(raw_ostream &OS) {
   OS << "#ifdef __cplusplus\n";
   OS << "} // extern \"C\"\n";
   OS << "#endif\n\n";
+  OS << "#undef __ai\n\n";
+  OS << "#undef __aio\n\n";
   OS << "#endif /*__ARM_FEATURE_SVE */\n\n";
   OS << "#endif /* __ARM_SVE_H */\n";
 }