diff --git a/src/southbridge/intel/ibexpeak/pch.c b/src/southbridge/intel/ibexpeak/pch.c
index 29c3a76..5a15e3d 100644
--- a/src/southbridge/intel/ibexpeak/pch.c
+++ b/src/southbridge/intel/ibexpeak/pch.c
@@ -66,24 +66,22 @@
 
 void pch_enable(struct device *dev)
 {
-	u32 reg32;
+	u16 reg16;
 
 	if (!dev->enabled) {
 		printk(BIOS_DEBUG, "%s: Disabling device\n",  dev_path(dev));
 
 		/* Ensure memory, io, and bus master are all disabled */
-		reg32 = pci_read_config32(dev, PCI_COMMAND);
-		reg32 &= ~(PCI_COMMAND_MASTER |
+		reg16 = pci_read_config16(dev, PCI_COMMAND);
+		reg16 &= ~(PCI_COMMAND_MASTER |
 			   PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
-		pci_write_config32(dev, PCI_COMMAND, reg32);
+		pci_write_config16(dev, PCI_COMMAND, reg16);
 
 		/* Disable this device if possible */
 		pch_disable_devfn(dev);
 	} else {
 		/* Enable SERR */
-		reg32 = pci_read_config32(dev, PCI_COMMAND);
-		reg32 |= PCI_COMMAND_SERR;
-		pci_write_config32(dev, PCI_COMMAND, reg32);
+		pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_SERR);
 	}
 }