diff --git a/libc/include/pty.h b/libc/include/pty.h
index ec257a5..cf9ccb9 100644
--- a/libc/include/pty.h
+++ b/libc/include/pty.h
@@ -36,9 +36,9 @@
 
 __BEGIN_DECLS
 
-int openpty(int*, int*, char*, const struct termios*, const struct winsize*) __INTRODUCED_IN(23);
-int forkpty(int*, char*, const struct termios*, const struct winsize*) __INTRODUCED_IN(23);
+int openpty(int* __master_fd, int* __slave_fd, char* __slave_name, const struct termios* __termios_ptr, const struct winsize* __winsize_ptr) __INTRODUCED_IN(23);
+int forkpty(int* __master_fd, char* __slave_name, const struct termios* __termios_ptr, const struct winsize* __winsize_ptr) __INTRODUCED_IN(23);
 
 __END_DECLS
 
-#endif /* _PTY_H */
+#endif