diff --git a/boards/sim/sim/sim/scripts/Make.defs b/boards/sim/sim/sim/scripts/Make.defs
index 897dd22bcf..fb6bad3a97 100644
--- a/boards/sim/sim/sim/scripts/Make.defs
+++ b/boards/sim/sim/sim/scripts/Make.defs
@@ -73,6 +73,9 @@ ARCHCXXFLAGS = -fno-common -ffunction-sections -fdata-sections -nostdinc++
 ifeq ($(CONFIG_CXX_EXCEPTION),)
   ARCHCXXFLAGS += -fno-exceptions -fcheck-new
 endif
+ifeq ($(CONFIG_CXX_RTTI),)
+  ARCHCXXFLAGS += -fno-rtti
+endif
 ARCHPICFLAGS = -fpic
 ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow -Wundef
 ARCHWARNINGSXX = -Wall -Wshadow -Wundef
diff --git a/libs/libxx/Kconfig b/libs/libxx/Kconfig
index 693c871dd2..29a33626ed 100644
--- a/libs/libxx/Kconfig
+++ b/libs/libxx/Kconfig
@@ -83,6 +83,9 @@ config HAVE_CXXINITIALIZE
 config CXX_EXCEPTION
 	bool "Enable Exception Support"
 
+config CXX_RTTI
+	bool "Enable RTTI Support"
+
 if UCLIBCXX
 
 config UCLIBCXX_BUFSIZE