diff --git a/boards/arm/lpc17xx_40xx/u-blox-c027/configs/nsh/defconfig b/boards/arm/lpc17xx_40xx/u-blox-c027/configs/nsh/defconfig
index 08c1b27019b..93383584468 100644
--- a/boards/arm/lpc17xx_40xx/u-blox-c027/configs/nsh/defconfig
+++ b/boards/arm/lpc17xx_40xx/u-blox-c027/configs/nsh/defconfig
@@ -10,7 +10,7 @@
 CONFIG_ARCH="arm"
 CONFIG_ARCH_BOARD="u-blox-c027"
 CONFIG_ARCH_BOARD_U_BLOX_C027=y
-+CONFIG_ARCH_CHIP="lpc17xx_40xx"
+CONFIG_ARCH_CHIP="lpc17xx_40xx"
 CONFIG_ARCH_CHIP_LPC1768=y
 CONFIG_ARCH_CHIP_LPC17XX_40XX=y
 CONFIG_ARCH_STACKDUMP=y