diff --git a/include/ext/__hash b/include/ext/__hash
index 8e9635d..21500e8 100644
--- a/include/ext/__hash
+++ b/include/ext/__hash
@@ -43,4 +43,4 @@
 };
 }
 
-#endif _LIBCPP_EXT_HASH
+#endif  // _LIBCPP_EXT_HASH