diff --git a/ports/atmel-samd/audio_dma.c b/ports/atmel-samd/audio_dma.c
index 6b5eeddcca..a34d5eca48 100644
--- a/ports/atmel-samd/audio_dma.c
+++ b/ports/atmel-samd/audio_dma.c
@@ -261,6 +261,7 @@ void audio_dma_stop(audio_dma_t* dma) {
     dma_disable_channel(dma->dma_channel);
     disable_event_channel(dma->event_channel);
     MP_STATE_PORT(playing_audio)[dma->dma_channel] = NULL;
+    audio_dma_state[dma->dma_channel] = NULL;
 
     dma->dma_channel = AUDIO_DMA_CHANNEL_COUNT;
 }