diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 286f05c..05e2541 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2627,7 +2627,7 @@
 
 #define PORT_DFT_I9XX				0x61150
 #define   DC_BALANCE_RESET			(1 << 25)
-#define PORT_DFT2_G4X				0x61154
+#define PORT_DFT2_G4X		(dev_priv->info.display_mmio_offset + 0x61154)
 #define   DC_BALANCE_RESET_VLV			(1 << 31)
 #define   PIPE_SCRAMBLE_RESET_MASK		(0x3 << 0)
 #define   PIPE_B_SCRAMBLE_RESET			(1 << 1)