diff --git a/configure b/configure
index 719244ef53..16c1f592a9 100755
--- a/configure
+++ b/configure
@@ -1808,7 +1808,6 @@ SYSTEM_FUNCS="
     GetProcessMemoryInfo
     GetProcessTimes
     getrusage
-    getservbyport
     GetSystemTimeAsFileTime
     gettimeofday
     glob
@@ -5106,7 +5105,6 @@ nvenc_encoder_extralibs='$ldl'
 
 if ! disabled network; then
     check_func getaddrinfo $network_extralibs
-    check_func getservbyport $network_extralibs
     check_func inet_aton $network_extralibs
 
     check_type netdb.h "struct addrinfo"
diff --git a/libavformat/os_support.c b/libavformat/os_support.c
index 7950e44889..86d0b8f306 100644
--- a/libavformat/os_support.c
+++ b/libavformat/os_support.c
@@ -205,16 +205,9 @@ int ff_getnameinfo(const struct sockaddr *sa, int salen,
     }
 
     if (serv && servlen > 0) {
-        struct servent *ent = NULL;
-#if HAVE_GETSERVBYPORT
         if (!(flags & NI_NUMERICSERV))
-            ent = getservbyport(sin->sin_port, flags & NI_DGRAM ? "udp" : "tcp");
-#endif /* HAVE_GETSERVBYPORT */
-
-        if (ent)
-            snprintf(serv, servlen, "%s", ent->s_name);
-        else
-            snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
+            return EAI_FAIL;
+        snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
     }
 
     return 0;