diff --git a/sound/soc/fsl/imx-audmux.c b/sound/soc/fsl/imx-audmux.c
index 251f4d981e0c6e8882c6f0d9c23efad821e87e05..fab912ea7a5098e7d168eafd236792918a043727 100644
--- a/sound/soc/fsl/imx-audmux.c
+++ b/sound/soc/fsl/imx-audmux.c
@@ -176,7 +176,7 @@ static inline void audmux_debugfs_remove(void)
 }
 #endif
 
-enum imx_audmux_type {
+static enum imx_audmux_type {
 	IMX21_AUDMUX,
 	IMX31_AUDMUX,
 } audmux_type;