diff --git a/nsock/src/nsock_connect.c b/nsock/src/nsock_connect.c
index c1befb3ca..a5a0ea56a 100644
--- a/nsock/src/nsock_connect.c
+++ b/nsock/src/nsock_connect.c
@@ -88,7 +88,7 @@ static int nsock_make_socket(mspool *ms, msiod *iod, int family, int type, int p
 
     rc = setsockopt(iod->sd, SOL_SOCKET, SO_REUSEADDR, (const char *)&one, sizeof(one));
     if (rc == -1)
-      nsock_log_error(ms, "Setting of SO_REUSEADDR failed (#%d): %s", iod->id,
+      nsock_log_error(ms, "Setting of SO_REUSEADDR failed (#%li): %s", iod->id,
                       strerror(errno));
 
     rc = bind(iod->sd, (struct sockaddr *)&iod->local, (int) iod->locallen);