diff --git a/drivers/video/acornfb.c b/drivers/video/acornfb.c
index 3bacc1290548f21c7e2e7a084448feaaa5fd7bed..b303f17150654a8a4d0237f41977421a29cd715b 100644
--- a/drivers/video/acornfb.c
+++ b/drivers/video/acornfb.c
@@ -850,9 +850,9 @@ acornfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 	u_int y_bottom = var->yoffset;
 
 	if (!(var->vmode & FB_VMODE_YWRAP))
-		y_bottom += var->yres;
+		y_bottom += info->var.yres;
 
-	if (y_bottom > var->yres_virtual)
+	if (y_bottom > info->var.yres_virtual)
 		return -EINVAL;
 
 	acornfb_update_dma(info, var);