diff --git a/include/swift/Basic/Algorithm.h b/include/swift/Basic/Algorithm.h
index c2cef45aff3..cd20825bb63 100644
--- a/include/swift/Basic/Algorithm.h
+++ b/include/swift/Basic/Algorithm.h
@@ -26,4 +26,4 @@ namespace swift {
   }
 } // namespace swift
 
-#endif
+#endif /* SWIFT_BASIC_ALGORITHM_H */