diff --git a/configs/z16f2800100zcog/ostest/defconfig b/configs/z16f2800100zcog/ostest/defconfig
index eb24435af29..4e95b886add 100644
--- a/configs/z16f2800100zcog/ostest/defconfig
+++ b/configs/z16f2800100zcog/ostest/defconfig
@@ -152,6 +152,7 @@ CONFIG_START_MONTH=1
 CONFIG_START_DAY=28
 CONFIG_JULIAN_TIME=n
 CONFIG_DEV_CONSOLE=y
+CONFIG_DEV_LOWCONSOLE=y
 
 #
 # The following can be used to disable categories of