diff --git a/spa/plugins/alsa/alsa-sink.c b/spa/plugins/alsa/alsa-sink.c
index 09f9266c8..8d4e212dc 100644
--- a/spa/plugins/alsa/alsa-sink.c
+++ b/spa/plugins/alsa/alsa-sink.c
@@ -656,6 +656,7 @@ static int impl_node_process(struct spa_node *node)
 		spa_log_trace(this->log, NAME " %p: queue buffer %u", this, input->buffer_id);
 		spa_list_append(&this->ready, &b->link);
 		SPA_FLAG_UNSET(b->flags, BUFFER_FLAG_OUT);
+		input->buffer_id = SPA_ID_INVALID;
 
 		spa_alsa_write(this, 0);
 
diff --git a/spa/plugins/alsa/alsa-utils.c b/spa/plugins/alsa/alsa-utils.c
index d2f04a07b..02b662394 100644
--- a/spa/plugins/alsa/alsa-utils.c
+++ b/spa/plugins/alsa/alsa-utils.c
@@ -587,6 +587,7 @@ int spa_alsa_write(struct state *state, snd_pcm_uframes_t silence)
 		if (state->ready_offset >= size) {
 			spa_list_remove(&b->link);
 			SPA_FLAG_SET(b->flags, BUFFER_FLAG_OUT);
+			state->io->buffer_id = b->buf->id;
 			spa_log_trace(state->log, "alsa-util %p: reuse buffer %u", state, b->buf->id);
 			state->callbacks->reuse_buffer(state->callbacks_data, 0, b->buf->id);
 			state->ready_offset = 0;