diff --git a/imap-send.c b/imap-send.c
index 01404e5047..3551908de6 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -190,7 +190,7 @@ static void socket_perror(const char *func, struct imap_socket *sock, int ret)
 
 #ifdef NO_OPENSSL
 static int ssl_socket_connect(struct imap_socket *sock UNUSED,
-			      const struct imap_server_conf *cfg,
+			      const struct imap_server_conf *cfg UNUSED,
 			      int use_tls_only UNUSED)
 {
 	fprintf(stderr, "SSL requested but SSL support not compiled in\n");