diff --git a/libc/include/netdb.h b/libc/include/netdb.h
index 5ad7b4a..ead5954 100644
--- a/libc/include/netdb.h
+++ b/libc/include/netdb.h
@@ -206,7 +206,7 @@
 void endprotoent(void);
 void endservent(void);
 void freehostent(struct hostent *);
-struct hostent	*gethostbyaddr(const void *, int, int);
+struct hostent	*gethostbyaddr(const void *, socklen_t, int);
 int gethostbyaddr_r(const void *, int, int, struct hostent *, char *, size_t, struct hostent **, int *);
 struct hostent	*gethostbyname(const char *);
 int gethostbyname_r(const char *, struct hostent *, char *, size_t, struct hostent **, int *);