diff --git a/src/southbridge/intel/ibexpeak/smbus.c b/src/southbridge/intel/ibexpeak/smbus.c
index 352b589..12734a0 100644
--- a/src/southbridge/intel/ibexpeak/smbus.c
+++ b/src/southbridge/intel/ibexpeak/smbus.c
@@ -14,12 +14,9 @@
 static void pch_smbus_init(struct device *dev)
 {
 	struct resource *res;
-	u16 reg16;
 
 	/* Enable clock gating */
-	reg16 = pci_read_config32(dev, 0x80);
-	reg16 &= ~((1 << 8) | (1 << 10) | (1 << 12) | (1 << 14));
-	pci_write_config32(dev, 0x80, reg16);
+	pci_and_config16(dev, 0x80, ~((1 << 8) | (1 << 10) | (1 << 12) | (1 << 14)));
 
 	/* Set Receive Slave Address */
 	res = find_resource(dev, PCI_BASE_ADDRESS_4);