diff --git a/mk/board_avr.mk b/mk/board_avr.mk
index 0e98d55752..28d390af3e 100644
--- a/mk/board_avr.mk
+++ b/mk/board_avr.mk
@@ -34,7 +34,7 @@ CPULDFLAGS= $($(TOOLCHAIN)_CPULDFLAGS)
 OPTFLAGS= $($(TOOLCHAIN)_OPTFLAGS)
 
 CXXFLAGS        =   -g $(CPUFLAGS) $(DEFINES) -Wa,$(LISTOPTS) $(OPTFLAGS)
-CXXFLAGS       +=   $(WARNFLAGS) $(WARNFLAGSCXX) $(DEPFLAGS) $(CXXOPTS)
+CXXFLAGS       +=   -std=gnu++11 $(WARNFLAGS) $(WARNFLAGSCXX) $(DEPFLAGS) $(CXXOPTS)
 CFLAGS          =   -g $(CPUFLAGS) $(DEFINES) -Wa,$(LISTOPTS) $(OPTFLAGS)
 CFLAGS         +=   $(WARNFLAGS) $(DEPFLAGS) $(COPTS)
 ASFLAGS         =   -g $(CPUFLAGS) $(DEFINES) -Wa,$(LISTOPTS) $(DEPFLAGS)
diff --git a/mk/board_native.mk b/mk/board_native.mk
index 7e366bf0b4..80abc863d0 100644
--- a/mk/board_native.mk
+++ b/mk/board_native.mk
@@ -29,7 +29,7 @@ CPULDFLAGS   = -g
 OPTFLAGS     ?= -O3 -g
 
 CXXFLAGS        =   -g $(CPUFLAGS) $(DEFINES) $(OPTFLAGS)
-CXXFLAGS       +=   $(WARNFLAGS) $(WARNFLAGSCXX) $(DEPFLAGS) $(CXXOPTS)
+CXXFLAGS       +=   -std=gnu++11 $(WARNFLAGS) $(WARNFLAGSCXX) $(DEPFLAGS) $(CXXOPTS)
 CFLAGS          =   -g $(CPUFLAGS) $(DEFINES) -Wa,$(LISTOPTS) $(OPTFLAGS)
 CFLAGS         +=   $(WARNFLAGS) $(DEPFLAGS) $(COPTS)
 ASFLAGS         =   -g $(CPUFLAGS) $(DEFINES) -Wa,$(LISTOPTS) $(DEPFLAGS)