diff --git a/boards/arm/lpc17xx_40xx/mbed/configs/nsh/defconfig b/boards/arm/lpc17xx_40xx/mbed/configs/nsh/defconfig
index 9124b09b88..ac9a4e1226 100644
--- a/boards/arm/lpc17xx_40xx/mbed/configs/nsh/defconfig
+++ b/boards/arm/lpc17xx_40xx/mbed/configs/nsh/defconfig
@@ -20,7 +20,6 @@ CONFIG_ARCH_CHIP="lpc17xx_40xx"
 CONFIG_ARCH_CHIP_LPC1768=y
 CONFIG_ARCH_CHIP_LPC17XX_40XX=y
 CONFIG_ARCH_STACKDUMP=y
-CONFIG_ARMV7M_TOOLCHAIN_BUILDROOT=y
 CONFIG_BOARD_LOOPSPERMSEC=7982
 CONFIG_FS_FAT=y
 CONFIG_LPC17_40_SSP0=y