diff --git a/configs/dockstar_defconfig b/configs/dockstar_defconfig
index 6c805f4..a17d01f 100644
--- a/configs/dockstar_defconfig
+++ b/configs/dockstar_defconfig
@@ -55,7 +55,8 @@
 CONFIG_PHY_MARVELL=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