diff --git a/configs/wb50n_defconfig b/configs/wb50n_defconfig
index aeb0247..ce3677b 100644
--- a/configs/wb50n_defconfig
+++ b/configs/wb50n_defconfig
@@ -14,6 +14,7 @@
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_MEMTEST=y
+CONFIG_SYS_ALT_MEMTEST=y
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_LOADS is not set
 CONFIG_CMD_NAND=y