diff --git a/src/northbridge/intel/sch/northbridge.c b/src/northbridge/intel/sch/northbridge.c
index fb3bff8492..4ca1248a0b 100644
--- a/src/northbridge/intel/sch/northbridge.c
+++ b/src/northbridge/intel/sch/northbridge.c
@@ -144,7 +144,7 @@ static void pci_domain_set_resources(device_t dev)
 		tseg_memory_size = tseg_size * 1024ULL;
 	}
 
-	reg16 = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0, 0)), GGC);
+	reg16 = pci_read_config16(dev_find_slot(0, PCI_DEVFN(2, 0)), GGC);
 	if (!(reg16 & 2)) {
 		int uma_size = 0;
 		printk(BIOS_DEBUG, "IGD decoded, subtracting ");