diff --git a/configs/sheevaplug_defconfig b/configs/sheevaplug_defconfig
index 52f5aba..79f36c0 100644
--- a/configs/sheevaplug_defconfig
+++ b/configs/sheevaplug_defconfig
@@ -65,7 +65,8 @@
 CONFIG_MII=y
 CONFIG_DM_RTC=y
 CONFIG_RTC_MV=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