diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c
index c66412566efc..056ae21a5121 100644
--- a/drivers/tty/hvc/hvc_opal.c
+++ b/drivers/tty/hvc/hvc_opal.c
@@ -103,7 +103,7 @@ static void hvc_opal_hvsi_close(struct hvc_struct *hp, int data)
 	notifier_del_irq(hp, data);
 }
 
-void hvc_opal_hvsi_hangup(struct hvc_struct *hp, int data)
+static void hvc_opal_hvsi_hangup(struct hvc_struct *hp, int data)
 {
 	struct hvc_opal_priv *pv = hvc_opal_privs[hp->vtermno];