diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig
index db916e6..29ae453 100644
--- a/configs/sandbox_flattree_defconfig
+++ b/configs/sandbox_flattree_defconfig
@@ -203,6 +203,7 @@
 CONFIG_TIMER_EARLY=y
 CONFIG_SANDBOX_TIMER=y
 CONFIG_USB=y
+CONFIG_DM_USB_GADGET=y
 CONFIG_USB_EMUL=y
 CONFIG_USB_KEYBOARD=y
 CONFIG_VIDEO=y