diff --git a/sys/arduino/Makefile.include b/sys/arduino/Makefile.include
index c9a218d7db..1adec285ca 100644
--- a/sys/arduino/Makefile.include
+++ b/sys/arduino/Makefile.include
@@ -20,9 +20,4 @@ endif
 # include the Arduino headers
 INCLUDES += -I$(RIOTBASE)/sys/arduino/include
 
-# Arduino provices C++11, which is not enabled by default in Ubuntu's avr-gcc
-# package, which is __horrible__ out of date. However, we cannot simply ignore
-# all Ubuntu users and instead simply manually enable C++11 support
-CXXEXFLAGS += -std=c++11
-
 PSEUDOMODULES += arduino_pwm
diff --git a/sys/cpp11-compat/Makefile b/sys/cpp11-compat/Makefile
index 9e24ecf137..48422e909a 100644
--- a/sys/cpp11-compat/Makefile
+++ b/sys/cpp11-compat/Makefile
@@ -1,4 +1 @@
-# This module requires cpp 11
-CXXEXFLAGS += -std=c++11
-
 include $(RIOTBASE)/Makefile.base
diff --git a/sys/cpp_new_delete/Makefile b/sys/cpp_new_delete/Makefile
index 025387e061..48422e909a 100644
--- a/sys/cpp_new_delete/Makefile
+++ b/sys/cpp_new_delete/Makefile
@@ -1,3 +1 @@
 include $(RIOTBASE)/Makefile.base
-
-CXXFLAGS += -std=c++11