diff --git a/sound/pci/ac97/ac97_patch.c b/sound/pci/ac97/ac97_patch.c
index d0cab1d38789..6ce3cbe98a6a 100644
--- a/sound/pci/ac97/ac97_patch.c
+++ b/sound/pci/ac97/ac97_patch.c
@@ -3548,7 +3548,7 @@ static const struct snd_kcontrol_new snd_ac97_controls_vt1617a[] = {
 	},
 };
 
-int patch_vt1617a(struct snd_ac97 * ac97)
+static int patch_vt1617a(struct snd_ac97 * ac97)
 {
 	int err = 0;
 	int val;
@@ -3764,7 +3764,7 @@ static const struct snd_kcontrol_new snd_ac97_controls_vt1618[] = {
 	}
 };
 
-int patch_vt1618(struct snd_ac97 *ac97)
+static int patch_vt1618(struct snd_ac97 *ac97)
 {
 	return patch_build_controls(ac97, snd_ac97_controls_vt1618,
 				    ARRAY_SIZE(snd_ac97_controls_vt1618));