diff --git a/spa/plugins/alsa/alsa-seq-bridge.c b/spa/plugins/alsa/alsa-seq-bridge.c
index 513b52600..57db2eda5 100644
--- a/spa/plugins/alsa/alsa-seq-bridge.c
+++ b/spa/plugins/alsa/alsa-seq-bridge.c
@@ -384,13 +384,16 @@ static struct seq_port *alloc_port(struct seq_state *state, struct seq_stream *s
 
 static void free_port(struct seq_state *state, struct seq_stream *stream, struct seq_port *port)
 {
+	port->valid = false;
+
 	if (port->id + 1 == stream->last_port) {
 		int i;
 		for (i = stream->last_port - 1; i >= 0; i--)
-			if (!stream->ports[i].valid)
+			if (stream->ports[i].valid)
 				break;
 		stream->last_port = i + 1;
 	}
+
 	spa_node_emit_port_info(&state->hooks,
 			port->direction, port->id, NULL);
 	spa_zero(*port);
diff --git a/spa/plugins/alsa/alsa-seq.c b/spa/plugins/alsa/alsa-seq.c
index fa04e8e67..006fce2a7 100644
--- a/spa/plugins/alsa/alsa-seq.c
+++ b/spa/plugins/alsa/alsa-seq.c
@@ -247,6 +247,11 @@ static void alsa_seq_on_sys(struct spa_source *source)
 					addr->client, addr->port);
 			state->port_info(state->port_info_data, addr, NULL);
 			break;
+		default:
+			spa_log_info(state->log, "unhandled event %d: %d:%d",
+					ev->type, addr->client, addr->port);
+			break;
+
 		}
 		snd_seq_free_event(ev);
         }