diff --git a/src/northbridge/intel/gm45/acpi.c b/src/northbridge/intel/gm45/acpi.c
index 467c6c1..dc59372 100644
--- a/src/northbridge/intel/gm45/acpi.c
+++ b/src/northbridge/intel/gm45/acpi.c
@@ -68,9 +68,11 @@
 
 static unsigned long acpi_fill_dmar(unsigned long current)
 {
-	int me_active = (dev_find_slot(0, PCI_DEVFN(3, 0)) != NULL) &&
-		(pci_read_config8(dev_find_slot(0, PCI_DEVFN(3, 0)), PCI_CLASS_REVISION) != 0xff);
-	int stepping = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), PCI_CLASS_REVISION);
+	int me_active = (pcidev_on_root(3, 0) != NULL) &&
+		(pci_read_config8(pcidev_on_root(3, 0), PCI_CLASS_REVISION) !=
+									 0xff);
+	int stepping = pci_read_config8(pcidev_on_root(0, 0),
+							   PCI_CLASS_REVISION);
 
 	unsigned long tmp = current;
 	current += acpi_create_dmar_drhd(current, 0, 0, IOMMU_BASE1);