diff --git a/boards/arm/stm32l4/nucleo-l476rg/scripts/Make.defs b/boards/arm/stm32l4/nucleo-l476rg/scripts/Make.defs
index 12e1bd7115..53c645e368 100644
--- a/boards/arm/stm32l4/nucleo-l476rg/scripts/Make.defs
+++ b/boards/arm/stm32l4/nucleo-l476rg/scripts/Make.defs
@@ -42,12 +42,7 @@ CPPFLAGS := $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
 AFLAGS := $(CFLAGS) -D__ASSEMBLY__
 
 ifeq ($(CONFIG_LIBCXX),y)
-  CXXFLAGS += -std=c++14 -D__GLIBCXX__ -DMB_LEN_MAX=8 -DHAVE_DEPENDENT_EH_ABI=0 \
-    -D_DEBUG -D_LIBCPP_BUILD_STATIC -D_LIBCPP_STD_VER=14
-
-  ifneq ($(CONFIG_CXX_EXCEPTION),y)
-    CXXFLAGS += -D_LIBCPP_NO_EXCEPTIONS
-  endif
+  CXXFLAGS += -std=c++14
 endif
 
 NXFLATLDFLAGS1 = -r -d -warn-common