diff --git a/libc/arch-aarch64/bionic/futex_aarch64.S b/libc/arch-aarch64/bionic/futex_aarch64.S
index e3ac309..d452771 100644
--- a/libc/arch-aarch64/bionic/futex_aarch64.S
+++ b/libc/arch-aarch64/bionic/futex_aarch64.S
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2013 The Android Open Source Project
- * All rights reserved
+ * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions