diff --git a/clang/utils/TableGen/RISCVVEmitter.cpp b/clang/utils/TableGen/RISCVVEmitter.cpp
--- a/clang/utils/TableGen/RISCVVEmitter.cpp
+++ b/clang/utils/TableGen/RISCVVEmitter.cpp
@@ -1019,7 +1019,7 @@
 
   OS << "\n#ifdef __cplusplus\n";
   OS << "}\n";
-  OS << "#endif // __riscv_vector\n";
+  OS << "#endif // __cplusplus\n";
   OS << "#endif // __RISCV_VECTOR_H\n";
 }