X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/f175bef138f45415b9559ee47c7be342ecb95ae0..18f1b2f3f8829931ac096942ff2d1ef85ab5f891:/src/src/ip.c

diff --git a/src/src/ip.c b/src/src/ip.c
index b744f5d4c..a8230a149 100644
--- a/src/src/ip.c
+++ b/src/src/ip.c
@@ -224,7 +224,7 @@ callout_address = string_sprintf("[%s]:%d", address, port);
 sigalrm_seen = FALSE;
 if (timeout > 0) alarm(timeout);
 
-#ifdef TCP_FASTOPEN
+#if defined(TCP_FASTOPEN) && defined(MSG_FASTOPEN)
 /* TCP Fast Open, if the system has a cookie from a previous call to
 this peer, can send data in the SYN packet.  The peer can send data
 before it gets our ACK of its SYN,ACK - the latter is useful for