diff --git a/sound/soc/au1x/dma.c b/sound/soc/au1x/dma.c
index dc4dae48aed9..c4017bd56ab8 100644
--- a/sound/soc/au1x/dma.c
+++ b/sound/soc/au1x/dma.c
@@ -316,7 +316,7 @@ static int alchemy_pcm_new(struct snd_soc_pcm_runtime *rtd)
 	return 0;
 }
 
-struct snd_soc_platform_driver alchemy_pcm_soc_platform = {
+static struct snd_soc_platform_driver alchemy_pcm_soc_platform = {
 	.ops		= &alchemy_pcm_ops,
 	.pcm_new	= alchemy_pcm_new,
 	.pcm_free	= alchemy_pcm_free_dma_buffers,