diff --git a/drivers/staging/xgifb/XGI_main_26.c b/drivers/staging/xgifb/XGI_main_26.c
index 83f8a6a662c0..fa351f90da33 100644
--- a/drivers/staging/xgifb/XGI_main_26.c
+++ b/drivers/staging/xgifb/XGI_main_26.c
@@ -1802,7 +1802,7 @@ static int xgifb_probe(struct pci_dev *pdev,
 	if (!XGIInitNew(pdev))
 		dev_err(&pdev->dev, "XGIInitNew() failed!\n");
 
-	xgifb_info->mtrr = (unsigned int) 0;
+	xgifb_info->mtrr = -1;
 
 	xgifb_info->hasVB = HASVB_NONE;
 	if ((xgifb_info->chip == XG20) ||
diff --git a/drivers/staging/xgifb/XGIfb.h b/drivers/staging/xgifb/XGIfb.h
index 80547983759b..af50362395d5 100644
--- a/drivers/staging/xgifb/XGIfb.h
+++ b/drivers/staging/xgifb/XGIfb.h
@@ -67,7 +67,7 @@ struct xgifb_video_info {
 	unsigned long mmio_size;
 	void __iomem *mmio_vbase;
 	unsigned long vga_base;
-	unsigned long mtrr;
+	int mtrr;
 
 	int    video_bpp;
 	int    video_cmap_len;