diff --git a/drivers/vlynq/vlynq.c b/drivers/vlynq/vlynq.c
index ba3d71f..9554ad5 100644
--- a/drivers/vlynq/vlynq.c
+++ b/drivers/vlynq/vlynq.c
@@ -702,7 +702,7 @@
 	dev->mem_start = mem_res->start;
 	dev->mem_end = mem_res->end;
 
-	len = regs_res->end - regs_res->start;
+	len = resource_size(regs_res);
 	if (!request_mem_region(regs_res->start, len, dev_name(&dev->dev))) {
 		printk(KERN_ERR "%s: Can't request vlynq registers\n",
 		       dev_name(&dev->dev));