diff --git a/libc/include/sys/inotify.h b/libc/include/sys/inotify.h
index c3cdc85..e834d07 100644
--- a/libc/include/sys/inotify.h
+++ b/libc/include/sys/inotify.h
@@ -42,7 +42,7 @@
 
 int inotify_init(void);
 int inotify_init1(int __flags) __INTRODUCED_IN(21);
-int inotify_add_watch(int __fd, const char* __path, uint32_t __mask);
+int inotify_add_watch(int __fd, const char* _Nonnull __path, uint32_t __mask);
 int inotify_rm_watch(int __fd, uint32_t __watch_descriptor);
 
 __END_DECLS