diff --git a/.sai.json b/.sai.json
index 42704ff65..7278ee04f 100644
--- a/.sai.json
+++ b/.sai.json
@@ -158,7 +158,7 @@
 			"platforms":	"not linux-centos-8/x86_64-amd/gcc"
 		},
 		"noserver": {
-			"cmake":	"-DLWS_WITHOUT_SERVER=ON -DLWS_WITH_MINIMAL_EXAMPLES=1"
+			"cmake":	"-DLWS_WITHOUT_SERVER=ON -DLWS_WITH_MINIMAL_EXAMPLES=1 -DLWS_WITH_SECURE_STREAMS=1"
 		},
 		"noclient": {
 			"cmake":	"-DLWS_WITHOUT_CLIENT=ON -DLWS_WITH_MINIMAL_EXAMPLES=1"
diff --git a/lib/secure-streams/secure-streams.c b/lib/secure-streams/secure-streams.c
index 9daeae504..d23b27e20 100644
--- a/lib/secure-streams/secure-streams.c
+++ b/lib/secure-streams/secure-streams.c
@@ -892,12 +892,14 @@ lws_ss_destroy(lws_ss_handle_t **ppss)
 	lws_free_set_NULL(h);
 }
 
+#if defined(LWS_WITH_SERVER)
 void
 lws_ss_server_ack(struct lws_ss_handle *h, int nack)
 {
 	h->txn_resp = nack;
 	h->txn_resp_set = 1;
 }
+#endif
 
 lws_ss_state_return_t
 lws_ss_request_tx(lws_ss_handle_t *h)