diff --git a/configs/cm5200_defconfig b/configs/cm5200_defconfig
index 5f691de..b3db9a6 100644
--- a/configs/cm5200_defconfig
+++ b/configs/cm5200_defconfig
@@ -15,6 +15,7 @@
 CONFIG_CMD_SNTP=y
 CONFIG_CMD_BSP=y
 CONFIG_CMD_FAT=y
+CONFIG_CMD_DIAG=y
 CONFIG_MAC_PARTITION=y
 CONFIG_ISO_PARTITION=y
 # CONFIG_MMC is not set