diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
index 239e4dd92ca1..963e2ccd10db 100644
--- a/drivers/net/can/dev.c
+++ b/drivers/net/can/dev.c
@@ -401,7 +401,7 @@ EXPORT_SYMBOL_GPL(can_free_echo_skb);
 /*
  * CAN device restart for bus-off recovery
  */
-void can_restart(unsigned long data)
+static void can_restart(unsigned long data)
 {
 	struct net_device *dev = (struct net_device *)data;
 	struct can_priv *priv = netdev_priv(dev);