diff --git a/prog/hotplug/p4b_smbus.c b/prog/hotplug/p4b_smbus.c
index 4ab358ff..be4b9556 100644
--- a/prog/hotplug/p4b_smbus.c
+++ b/prog/hotplug/p4b_smbus.c
@@ -86,7 +86,7 @@ rmm    from lm_sensors-2.3.3:
  * some shorter definitions for the ICHx PCI device IDs
  */
 
-#define ICH4 0x2440
+#define ICH2 0x2440
 #define ICH2_SMBUS 0x2443
 
 #define ICH4 0x24c0