diff --git a/boards/arm/cxd56xx/spresense/configs/lte/defconfig b/boards/arm/cxd56xx/spresense/configs/lte/defconfig
index ab5e4b308c1..987f31ed6c8 100644
--- a/boards/arm/cxd56xx/spresense/configs/lte/defconfig
+++ b/boards/arm/cxd56xx/spresense/configs/lte/defconfig
@@ -46,6 +46,7 @@ CONFIG_MAX_WDOGPARMS=2
 CONFIG_MMCSD=y
 CONFIG_MMCSD_SDIO=y
 CONFIG_MODEM=y
+CONFIG_MODEM_ALTMDM=y
 CONFIG_MTD_BYTE_WRITE=y
 CONFIG_MTD_PARTITION=y
 CONFIG_MTD_SMART=y