diff --git a/drivers/serial/serial_cs.c b/drivers/serial/serial_cs.c
index 7c8d78fbbbfb80965e31100a91d9a93faf47174e..5afcb2fa7cd3f16117fc15b0996bda6f0607b75c 100644
--- a/drivers/serial/serial_cs.c
+++ b/drivers/serial/serial_cs.c
@@ -911,6 +911,7 @@ static struct pcmcia_device_id serial_ids[] = {
 	PCMCIA_MFC_DEVICE_CIS_MANF_CARD(1, 0x0175, 0x0000, "DP83903.cis"),
 	PCMCIA_MFC_DEVICE_CIS_MANF_CARD(1, 0x0101, 0x0035, "3CXEM556.cis"),
 	PCMCIA_MFC_DEVICE_CIS_MANF_CARD(1, 0x0101, 0x003d, "3CXEM556.cis"),
+	PCMCIA_DEVICE_CIS_PROD_ID12("Sierra Wireless", "AC850", 0xd85f6206, 0x42a2c018, "SW_8xx_SER.cis"),  /* Sierra Wireless AC850 3G Network Adapter R1 */
 	PCMCIA_DEVICE_CIS_MANF_CARD(0x0192, 0x0710, "SW_7xx_SER.cis"),	/* Sierra Wireless AC710/AC750 GPRS Network Adapter R1 */
 	PCMCIA_DEVICE_CIS_MANF_CARD(0x0192, 0xa555, "SW_555_SER.cis"),  /* Sierra Aircard 555 CDMA 1xrtt Modem -- pre update */
 	PCMCIA_DEVICE_CIS_MANF_CARD(0x013f, 0xa555, "SW_555_SER.cis"),  /* Sierra Aircard 555 CDMA 1xrtt Modem -- post update */