diff --git a/src/ustreamer/http/server.c b/src/ustreamer/http/server.c
index 1fe1f30..bd0c219 100644
--- a/src/ustreamer/http/server.c
+++ b/src/ustreamer/http/server.c
@@ -667,10 +667,12 @@ static void _http_callback_stream_write(struct bufferevent *buf_event, void *v_c
 			"Cache-Control: no-store, no-cache, must-revalidate, proxy-revalidate, pre-check=0, post-check=0, max-age=0" RN
 			"Pragma: no-cache" RN
 			"Expires: Mon, 3 Jan 2000 12:34:56 GMT" RN
-			"Set-Cookie: stream_client=%s/%" PRIx64 "; path=/; max-age=30" RN
+			"Set-Cookie: stream_client%s%s=%s/%" PRIx64 "; path=/; max-age=30" RN
 			"Content-Type: multipart/x-mixed-replace;boundary=" BOUNDARY RN
 			RN
 			"--" BOUNDARY RN,
+			(server->instance_id[0] == '\0' ? "" : "_"),
+			server->instance_id,
 			(client->key != NULL ? client->key : "0"),
 			client->id
 		);