diff --git a/configs/ib62x0_defconfig b/configs/ib62x0_defconfig
index 9290cb7..beee589 100644
--- a/configs/ib62x0_defconfig
+++ b/configs/ib62x0_defconfig
@@ -59,7 +59,8 @@
 CONFIG_MTD_RAW_NAND=y
 CONFIG_MVGBE=y
 CONFIG_MII=y
-CONFIG_SYS_NS16550=y
+CONFIG_SYS_NS16550_SERIAL=y
+CONFIG_SYS_NS16550_REG_SIZE=-4
 CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_STORAGE=y