diff --git a/boards/arm/lpc17xx_40xx/lx_cpu/configs/nsh/defconfig b/boards/arm/lpc17xx_40xx/lx_cpu/configs/nsh/defconfig
index bacaeb8cf3..ef1bdc5e6a 100644
--- a/boards/arm/lpc17xx_40xx/lx_cpu/configs/nsh/defconfig
+++ b/boards/arm/lpc17xx_40xx/lx_cpu/configs/nsh/defconfig
@@ -94,7 +94,7 @@ CONFIG_M25P_SUBSECTOR_ERASE=y
 CONFIG_MAX_TASKS=16
 CONFIG_MMCSD=y
 CONFIG_MMCSD_SDIO=y
-CONFIG_MM_REGIONS=2
+CONFIG_MM_REGIONS=3
 CONFIG_MTD=y
 CONFIG_MTD_M25P=y
 CONFIG_NETDB_DNSCLIENT=y