diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig
index 01234dc183..7237efe685 100644
--- a/configs/sandbox_flattree_defconfig
+++ b/configs/sandbox_flattree_defconfig
@@ -216,3 +216,4 @@ CONFIG_EFI_CAPSULE_FIRMWARE_FIT=y
 CONFIG_UNIT_TEST=y
 CONFIG_UT_TIME=y
 CONFIG_UT_DM=y
+CONFIG_IPV6=y