diff --git a/libc/include/dirent.h b/libc/include/dirent.h
index ebcf085..7ac4ab7 100644
--- a/libc/include/dirent.h
+++ b/libc/include/dirent.h
@@ -76,30 +76,27 @@
 
 typedef struct DIR DIR;
 
-DIR* opendir(const char*);
-DIR* fdopendir(int);
-struct dirent* readdir(DIR*);
-struct dirent64* readdir64(DIR*) __INTRODUCED_IN(21);
-int readdir_r(DIR*, struct dirent*, struct dirent**);
-int readdir64_r(DIR*, struct dirent64*, struct dirent64**) __INTRODUCED_IN(21);
-int closedir(DIR*);
-void rewinddir(DIR*);
-void seekdir(DIR*, long) __INTRODUCED_IN(23);
-long telldir(DIR*) __INTRODUCED_IN(23);
-int dirfd(DIR*);
-int alphasort(const struct dirent**, const struct dirent**);
-int alphasort64(const struct dirent64**, const struct dirent64**) __INTRODUCED_IN(21);
-int scandir64(const char*, struct dirent64***, int (*)(const struct dirent64*),
-              int (*)(const struct dirent64**, const struct dirent64**)) __INTRODUCED_IN(21);
-int scandir(const char*, struct dirent***, int (*)(const struct dirent*), int (*)(const struct dirent**, const struct dirent**));
+DIR* opendir(const char* __path);
+DIR* fdopendir(int __dir_fd);
+struct dirent* readdir(DIR* __dir);
+struct dirent64* readdir64(DIR* __dir) __INTRODUCED_IN(21);
+int readdir_r(DIR* __dir, struct dirent* __entry, struct dirent** __buffer);
+int readdir64_r(DIR* __dir, struct dirent64* __entry, struct dirent64** __buffer) __INTRODUCED_IN(21);
+int closedir(DIR* __dir);
+void rewinddir(DIR* __dir);
+void seekdir(DIR* __dir, long __location) __INTRODUCED_IN(23);
+long telldir(DIR* __dir) __INTRODUCED_IN(23);
+int dirfd(DIR* __dir);
+int alphasort(const struct dirent** __lhs, const struct dirent** __rhs);
+int alphasort64(const struct dirent64** __lhs, const struct dirent64** __rhs) __INTRODUCED_IN(21);
+int scandir64(const char* __path, struct dirent64*** __name_list, int (*__filter)(const struct dirent64*), int (*__comparator)(const struct dirent64**, const struct dirent64**)) __INTRODUCED_IN(21);
+int scandir(const char* __path, struct dirent*** __name_list, int (*__filter)(const struct dirent*), int (*__comparator)(const struct dirent**, const struct dirent**));
 
 #if defined(__USE_GNU)
-int scandirat64(int, const char*, struct dirent64***, int (*)(const struct dirent64*),
-                int (*)(const struct dirent64**, const struct dirent64**)) __INTRODUCED_IN(24);
-int scandirat(int, const char*, struct dirent***, int (*)(const struct dirent*),
-              int (*)(const struct dirent**, const struct dirent**)) __INTRODUCED_IN(24);
+int scandirat64(int __dir_fd, const char* __path, struct dirent64*** __name_list, int (*__filter)(const struct dirent64*), int (*__comparator)(const struct dirent64**, const struct dirent64**)) __INTRODUCED_IN(24);
+int scandirat(int __dir_fd, const char* __path, struct dirent*** __name_list, int (*__filter)(const struct dirent*), int (*__comparator)(const struct dirent**, const struct dirent**)) __INTRODUCED_IN(24);
 #endif
 
 __END_DECLS
 
-#endif /* _DIRENT_H_ */
+#endif