diff --git a/libc/include/utmp.h b/libc/include/utmp.h
index 62e8d59..6a52511 100644
--- a/libc/include/utmp.h
+++ b/libc/include/utmp.h
@@ -96,12 +96,12 @@
 
 __BEGIN_DECLS
 
-int utmpname(const char*);
+int utmpname(const char* __path);
 void setutent(void);
 struct utmp* getutent(void);
 void endutent(void);
 
-int login_tty(int) __INTRODUCED_IN(23);
+int login_tty(int __fd) __INTRODUCED_IN(23);
 
 __END_DECLS