diff --git a/boards/arm/xmc4/xmc4800-relax/configs/nsh/defconfig b/boards/arm/xmc4/xmc4800-relax/configs/nsh/defconfig
index b96ceae5a2..05b1079e96 100644
--- a/boards/arm/xmc4/xmc4800-relax/configs/nsh/defconfig
+++ b/boards/arm/xmc4/xmc4800-relax/configs/nsh/defconfig
@@ -18,9 +18,14 @@ CONFIG_ARCH_IRQBUTTONS=y
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_BOARD_LOOPSPERMSEC=8000
 CONFIG_BUILTIN=y
+CONFIG_CXX_EXCEPTION=y
+CONFIG_CXX_RTTI=y
+CONFIG_CXX_STANDARD="c++17"
 CONFIG_DEBUG_NOOPT=y
+CONFIG_HAVE_CXX=y
 CONFIG_INIT_ENTRYPOINT="nsh_main"
 CONFIG_INTELHEX_BINARY=y
+CONFIG_LIBCXXTOOLCHAIN=y
 CONFIG_NSH_ARCHINIT=y
 CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_FILEIOSIZE=512
@@ -37,6 +42,7 @@ CONFIG_START_DAY=10
 CONFIG_START_MONTH=3
 CONFIG_START_YEAR=2014
 CONFIG_SYSTEM_NSH=y
+CONFIG_TESTING_CXXTEST=y
 CONFIG_TESTING_RAMTEST=y
 CONFIG_UART0_SERIAL_CONSOLE=y
 CONFIG_XMC4_USIC0=y