1 files changed, 2 insertions, 0 deletions

diff --git a/regress/netcat.c b/regress/netcat.c
index bffaade58..84efe1182 100644
--- a/regress/netcat.c
+++ b/regress/netcat.c
@@ -1144,11 +1144,13 @@ set_common_sockopts(int s)
 {
         int x = 1;
 
+#ifdef TCP_MD5SIG
         if (Sflag) {
                 if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
                         &x, sizeof(x)) == -1)
                         err(1, NULL);
         }
+#endif
         if (Dflag) {
                 if (setsockopt(s, SOL_SOCKET, SO_DEBUG,
                         &x, sizeof(x)) == -1)