diff --git a/ChangeLog b/ChangeLog
index c569328f5..f217bd831 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -11,6 +11,8 @@
  - (djm) [session.c] Allow ChrootDirectory to work on SELinux platforms -
    set up SELinux execution context before chroot() call. From Russell
    Coker via Colin watson; bz#1726 ok dtucker@
+ - (djm) [channels.c] Check for EPFNOSUPPORT as a socket() errno; bz#1721
+   ok dtucker@
 
 20100324
  - (dtucker) [contrib/cygwin/ssh-host-config] Mount the Windows directory
diff --git a/channels.c b/channels.c
index d8c53a4a8..a55d27817 100644
--- a/channels.c
+++ b/channels.c
@@ -3252,7 +3252,11 @@ x11_create_display_inet(int x11_display_offset, int x11_use_localhost,
 			sock = socket(ai->ai_family, ai->ai_socktype,
 			    ai->ai_protocol);
 			if (sock < 0) {
-				if ((errno != EINVAL) && (errno != EAFNOSUPPORT)) {
+				if ((errno != EINVAL) && (errno != EAFNOSUPPORT)
+#ifdef EPFNOSUPPORT
+				    && (errno != EPFNOSUPPORT)
+#endif 
+				    ) {
 					error("socket: %.100s", strerror(errno));
 					freeaddrinfo(aitop);
 					return -1;