diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index c27cc7b374407..6fe679143216f 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -824,6 +824,7 @@ static void sja1105_phylink_validate(struct dsa_switch *ds, int port,
 	phylink_set(mask, MII);
 	phylink_set(mask, 10baseT_Full);
 	phylink_set(mask, 100baseT_Full);
+	phylink_set(mask, 100baseT1_Full);
 	if (mii->xmii_mode[port] == XMII_MODE_RGMII)
 		phylink_set(mask, 1000baseT_Full);