diff --git a/kernel/chips/sis5595.c b/kernel/chips/sis5595.c
index 6c2e58ec..88960186 100644
--- a/kernel/chips/sis5595.c
+++ b/kernel/chips/sis5595.c
@@ -97,7 +97,6 @@ static int blacklist[] = {
 /* Length of ISA address segment */
 #define SIS5595_EXTENT 8
 /* PCI Config Registers */
-#define SIS5595_REVISION_REG 0x08
 #define SIS5595_BASE_REG 0x68
 #define SIS5595_PIN_REG 0x7A
 #define SIS5595_ENABLE_REG 0x7B
@@ -394,7 +393,7 @@ int sis5595_detect(struct i2c_adapter *adapter, int address,
 	request_region(address, SIS5595_EXTENT, type_name);
 
 	/* Check revision and pin registers to determine whether 4 or 5 voltages */
-	pci_read_config_byte(s_bridge, SIS5595_REVISION_REG, &(data->revision));
+	pci_read_config_byte(s_bridge, PCI_REVISION_ID, &(data->revision));
 	/* 4 voltages, 1 temp */
 	data->maxins = 3;
 	if (data->revision >= REV2MIN) {