diff --git a/lib/hostip.h b/lib/hostip.h
index 7053434ba5068ee89fed8cf191a71cb45aa59ef8..3b8f8ce1559f69d40c19bf8272765a8ae17d1b29 100644
--- a/lib/hostip.h
+++ b/lib/hostip.h
@@ -196,9 +196,11 @@ int curl_dogetaddrinfo(char *hostname, char *service,
                        struct addrinfo *hints,
                        struct addrinfo **result,
                        int line, const char *source);
-int curl_dogetnameinfo(const struct sockaddr *sa, socklen_t salen,
-                       char *host, size_t hostlen,
-                       char *serv, size_t servlen, int flags,
+int curl_dogetnameinfo(GETNAMEINFO_QUAL_ARG1 GETNAMEINFO_TYPE_ARG1 sa,
+                       GETNAMEINFO_TYPE_ARG2 salen,
+                       char *host, GETNAMEINFO_TYPE_ARG46 hostlen,
+                       char *serv, GETNAMEINFO_TYPE_ARG46 servlen,
+                       GETNAMEINFO_TYPE_ARG7 flags,
                        int line, const char *source);
 #endif
 
diff --git a/lib/hostip6.c b/lib/hostip6.c
index 07bb37ae033c700603ba8a030400d70dc19ebc1a..b17bce9be622dcb6b7faf652368743c72bf74bff 100644
--- a/lib/hostip6.c
+++ b/lib/hostip6.c
@@ -136,9 +136,11 @@ int curl_dogetaddrinfo(char *hostname, char *service,
   return res;
 }
 
-int curl_dogetnameinfo(const struct sockaddr *sa, socklen_t salen,
-                       char *host, size_t hostlen,
-                       char *serv, size_t servlen, int flags,
+int curl_dogetnameinfo(GETNAMEINFO_QUAL_ARG1 GETNAMEINFO_TYPE_ARG1 sa,
+                       GETNAMEINFO_TYPE_ARG2 salen,
+                       char *host, GETNAMEINFO_TYPE_ARG46 hostlen,
+                       char *serv, GETNAMEINFO_TYPE_ARG46 servlen,
+                       GETNAMEINFO_TYPE_ARG7 flags,
                        int line, const char *source)
 {
   int res = (getnameinfo)(sa, salen,