diff --git a/sound/soc/mid-x86/sst_platform.c b/sound/soc/mid-x86/sst_platform.c
index 848ad3ce732e..9ba941447d41 100644
--- a/sound/soc/mid-x86/sst_platform.c
+++ b/sound/soc/mid-x86/sst_platform.c
@@ -271,6 +271,7 @@ static int sst_platform_close(struct snd_pcm_substream *substream)
 	str_id = stream->stream_info.str_id;
 	if (str_id)
 		ret_val = stream->sstdrv_ops->pcm_control->close(str_id);
+	unregister_sst_card(stream->sstdrv_ops);
 	kfree(stream->sstdrv_ops);
 	kfree(stream);
 	return ret_val;