diff --git a/drivers/staging/gma500/psb_drv.c b/drivers/staging/gma500/psb_drv.c
index f98f4f46aeb3..4d0d1fe5b5e2 100644
--- a/drivers/staging/gma500/psb_drv.c
+++ b/drivers/staging/gma500/psb_drv.c
@@ -565,7 +565,11 @@ static int psb_driver_load(struct drm_device *dev, unsigned long chipset)
 	if (!dev_priv->vdc_reg)
 		goto out_err;
 
-	dev_priv->sgx_reg = ioremap(resource_start + PSB_SGX_OFFSET,
+	if (IS_MRST(dev))
+		dev_priv->sgx_reg = ioremap(resource_start + MRST_SGX_OFFSET,
+							PSB_SGX_SIZE);
+	else
+		dev_priv->sgx_reg = ioremap(resource_start + PSB_SGX_OFFSET,
 							PSB_SGX_SIZE);
 
 	if (!dev_priv->sgx_reg)