diff --git a/libc/include/sys/procfs.h b/libc/include/sys/procfs.h
index 75a1e98..eff39e2 100644
--- a/libc/include/sys/procfs.h
+++ b/libc/include/sys/procfs.h
@@ -59,4 +59,4 @@
 
 __END_DECLS
 
-#endif
+#endif /* _SYS_PROCFS_H_ */