diff --git a/include/resolv.h b/include/resolv.h
index 09fcfdfe..e12cb3c7 100644
--- a/include/resolv.h
+++ b/include/resolv.h
@@ -125,14 +125,12 @@ struct res_sym {
 struct __res_state *__res_state(void);
 #define _res (*__res_state())
 
-struct rrec;
-
 int res_init(void);
 int res_query(const char *, int, int, unsigned char *, int);
 int res_querydomain(const char *, const char *, int, int, unsigned char *, int);
 int res_search(const char *, int, int, unsigned char *, int);
-int res_mkquery(int, const char *, int, int, char *, int, struct rrec *, char *, int);
-int res_send(const char *, int, char *, int);
+int res_mkquery(int, const char *, int, int, const unsigned char *, int, const unsigned char*, unsigned char *, int);
+int res_send(const unsigned char *, int, unsigned char *, int);
 int dn_comp(const char *, unsigned char *, int, unsigned char **, unsigned char **);
 int dn_expand(const unsigned char *, const unsigned char *, const unsigned char *, char *, int);
 int dn_skipname(const unsigned char *, const unsigned char *);