diff --git a/src/drivers/aspeed/ast2050/ast2050.c b/src/drivers/aspeed/ast2050/ast2050.c
index 3aa4195928..ea86e28ffe 100644
--- a/src/drivers/aspeed/ast2050/ast2050.c
+++ b/src/drivers/aspeed/ast2050/ast2050.c
@@ -14,7 +14,7 @@
 static void aspeed_ast2050_read_resources(struct device *dev)
 {
 	/* Reserve VGA regions */
-	mmio_resource_kb(dev, 3, 0xa0000 >> 10, 0x1ffff >> 10);
+	mmio_from_to(dev, 3, 0xa0000, 0xc0000);
 
 	/* Run standard resource read routine */
 	pci_dev_read_resources(dev);