diff --git a/drivers/net/slip.c b/drivers/net/slip.c
index a78966e8ab6..a4c46089293 100644
--- a/drivers/net/slip.c
+++ b/drivers/net/slip.c
@@ -818,6 +818,7 @@ static int slip_ifup(FAR struct net_driver_s *dev)
   /* Mark the interface up */
 
   priv->bifup = true;
+  netdev_carrier_on(dev);
   return OK;
 }
 
@@ -842,6 +843,8 @@ static int slip_ifdown(FAR struct net_driver_s *dev)
   FAR struct slip_driver_s *priv =
     (FAR struct slip_driver_s *)dev->d_private;
 
+  netdev_carrier_off(dev);
+
   /* Mark the device "down" */
 
   priv->bifup = false;