diff --git a/configs/nucleus2g/ostest/defconfig b/configs/nucleus2g/ostest/defconfig
index 49c351c5d7..72e29a9e49 100755
--- a/configs/nucleus2g/ostest/defconfig
+++ b/configs/nucleus2g/ostest/defconfig
@@ -97,7 +97,6 @@ CONFIG_LPC17_CODESOURCERYL=n
 CONFIG_LPC17_DEVKITARM=n
 CONFIG_LPC17_RAISONANCE=n
 CONFIG_LPC17_BUILDROOT=y
-CONFIG_LPC17_DFU=y
 
 #
 #  Individual subsystems can be enabled: