diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index d01bfd6091305fbfe1fabde784274a3cc98b0809..060e41b9b6ef5cd6f6e55127006583d089635e50 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -1357,6 +1357,8 @@ int ksz8_setup(struct dsa_switch *ds)
 	struct ksz_device *dev = ds->priv;
 	int i;
 
+	ds->mtu_enforcement_ingress = true;
+
 	ksz_cfg(dev, S_REPLACE_VID_CTRL, SW_FLOW_CTRL, true);
 
 	/* Enable automatic fast aging when link changed detected. */
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index f6e7968ab10559a3f2ab7d2a29b6aebf1ff47fe1..47b54ecf2c6f6b502cd968968d0018c053aec26c 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -1134,6 +1134,8 @@ int ksz9477_setup(struct dsa_switch *ds)
 	struct ksz_device *dev = ds->priv;
 	int ret = 0;
 
+	ds->mtu_enforcement_ingress = true;
+
 	/* Required for port partitioning. */
 	ksz9477_cfg32(dev, REG_SW_QM_CTRL__4, UNICAST_VLAN_BOUNDARY,
 		      true);