diff --git a/drivers/net/wwan/iosm/iosm_ipc_wwan.c b/drivers/net/wwan/iosm/iosm_ipc_wwan.c
index e0c19c59c5f64..b2357ad5d5171 100644
--- a/drivers/net/wwan/iosm/iosm_ipc_wwan.c
+++ b/drivers/net/wwan/iosm/iosm_ipc_wwan.c
@@ -162,6 +162,7 @@ static void ipc_wwan_setup(struct net_device *iosm_dev)
 	iosm_dev->priv_flags |= IFF_NO_QUEUE;
 
 	iosm_dev->type = ARPHRD_NONE;
+	iosm_dev->mtu = ETH_DATA_LEN;
 	iosm_dev->min_mtu = ETH_MIN_MTU;
 	iosm_dev->max_mtu = ETH_MAX_MTU;