diff --git a/kernel/busses/i2c-nforce2.c b/kernel/busses/i2c-nforce2.c
index 007c4bfd..e705971a 100644
--- a/kernel/busses/i2c-nforce2.c
+++ b/kernel/busses/i2c-nforce2.c
@@ -27,9 +27,10 @@
     nForce2 Ultra 400 MCP	0084
     nForce3 Pro150 MCP		00D4
     nForce3 250Gb MCP		00E4
+    nForce4 MCP			0052
 
-    This driver supports the 2 SMBuses that are included in the MCP2 of the
-    nForce2 chipset.
+    This driver supports the 2 SMBuses that are included in the MCP of the
+    nForce2/3/4 chipsets.
 */
 
 /* Note: we assume there can only be one nForce2, with two SMBus interfaces */
@@ -68,6 +69,10 @@ MODULE_DESCRIPTION("nForce2 SMBus driver");
 #define PCI_DEVICE_ID_NVIDIA_NFORCE3S_SMBUS	0x00E4
 #endif
 
+#ifndef PCI_DEVICE_ID_NVIDIA_NFORCE4_SMBUS
+#define PCI_DEVICE_ID_NVIDIA_NFORCE4_SMBUS	0x0052
+#endif
+
 
 struct nforce2_smbus {
 	struct pci_dev *dev;
@@ -323,6 +328,8 @@ static struct pci_device_id nforce2_ids[] = {
 	       	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SMBUS,
 	       	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE4_SMBUS,
+	       	PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 	{ 0 }
 };