diff --git a/src/northbridge/intel/i945/gma.c b/src/northbridge/intel/i945/gma.c
index 453e9c8..1cf80a9 100644
--- a/src/northbridge/intel/i945/gma.c
+++ b/src/northbridge/intel/i945/gma.c
@@ -59,8 +59,8 @@
 	graphics_base = dev->resource_list[2].base + 0x20000;
 
 	printk(BIOS_SPEW, "GMADR=0x%08x GTTADR=0x%08x\n",
-		pci_read_config32(dev, 0x18),
-		pci_read_config32(dev, 0x1c)
+		pci_read_config32(dev, GMADR),
+		pci_read_config32(dev, GTTADR)
 	);
 
 	int i915lightup(u32 physbase, u32 iobase, u32 mmiobase, u32 gfx);
diff --git a/src/northbridge/intel/i945/i945.h b/src/northbridge/intel/i945/i945.h
index 8212386..9be9379 100644
--- a/src/northbridge/intel/i945/i945.h
+++ b/src/northbridge/intel/i945/i945.h
@@ -87,6 +87,8 @@
 
 /* Device 0:2.0 PCI configuration space (Graphics Device) */
 
+#define GMADR		0x18
+#define GTTADR		0x1c
 #define BSM		0x5c
 #define GCFC		0xf0	/* Graphics Clock Frequency & Gating Control */