diff --git a/sound/soc/sof/intel/bdw.c b/sound/soc/sof/intel/bdw.c
index de3d14e37518..c09885c0eb7d 100644
--- a/sound/soc/sof/intel/bdw.c
+++ b/sound/soc/sof/intel/bdw.c
@@ -554,8 +554,8 @@ static void bdw_machine_select(struct snd_sof_dev *sdev)
 	sof_pdata->machine = mach;
 }
 
-void bdw_set_mach_params(const struct snd_soc_acpi_mach *mach,
-			 struct device *dev)
+static void bdw_set_mach_params(const struct snd_soc_acpi_mach *mach,
+				struct device *dev)
 {
 	struct snd_soc_acpi_mach_params *mach_params;