diff --git a/configs/sandbox_noblk_defconfig b/configs/sandbox_noblk_defconfig
index 090e057..4bf1f4b 100644
--- a/configs/sandbox_noblk_defconfig
+++ b/configs/sandbox_noblk_defconfig
@@ -23,6 +23,7 @@
 CONFIG_CMD_ASKENV=y
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_ENV_CALLBACK=y
+CONFIG_CMD_ENV_FLAGS=y
 CONFIG_CMD_MD5SUM=y
 CONFIG_LOOPW=y
 CONFIG_CMD_MEMTEST=y