diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c
index 53fa19cf2f0636d6dd79d0918266243441bda31f..788c3559522d05254ce769b7a92395635da8fabc 100644
--- a/drivers/serial/8250_pci.c
+++ b/drivers/serial/8250_pci.c
@@ -2602,7 +2602,12 @@ static struct pci_device_id serial_pci_tbl[] = {
 	{	PCI_VENDOR_ID_INTASHIELD, PCI_DEVICE_ID_INTASHIELD_IS200,
 		PCI_ANY_ID, PCI_ANY_ID, 0, 0,	/* 135a.0811 */
 		pbn_b2_2_115200 },
-
+	/*
+	 * IntaShield IS-400
+	 */
+	{	PCI_VENDOR_ID_INTASHIELD, PCI_DEVICE_ID_INTASHIELD_IS400,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,    /* 135a.0dc0 */
+		pbn_b2_4_115200 },
 	/*
 	 * Perle PCI-RAS cards
 	 */
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 342b55afb0c3b714bf411a08c0b1fa1191ad4bda..9b940e64417956006015b0d321b8690802686fac 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -1761,6 +1761,7 @@
 
 #define PCI_VENDOR_ID_INTASHIELD	0x135a
 #define PCI_DEVICE_ID_INTASHIELD_IS200	0x0d80
+#define PCI_DEVICE_ID_INTASHIELD_IS400	0x0dc0
 
 #define PCI_VENDOR_ID_QUATECH		0x135C
 #define PCI_DEVICE_ID_QUATECH_QSC100	0x0010