diff --git a/mk/board_native.mk b/mk/board_native.mk
index a97fe23fcd..a71e8660b1 100644
--- a/mk/board_native.mk
+++ b/mk/board_native.mk
@@ -5,6 +5,7 @@ include $(MK_DIR)/find_tools.mk
 # Hardcoded libraries/AP_Common/missing/cmath defines in "make" to retain the current behavior
 EXTRAFLAGS += -DHAVE_CMATH_ISFINITE -DNEED_CMATH_ISFINITE_STD_NAMESPACE
 
+EXTRAFLAGS += -DHAVE_ENDIAN_H -DHAVE_BYTESWAP_H
 #
 # Tool options
 #
diff --git a/mk/board_qflight.mk b/mk/board_qflight.mk
index 3209c10f50..63757bee05 100644
--- a/mk/board_qflight.mk
+++ b/mk/board_qflight.mk
@@ -37,7 +37,7 @@ GENERATE_TARGETS = $(GENERATE_DSP_C) $(GENERATE_ARM_C) $(QFLIGHT_BUILD)/qflight_
 LIBOBJS += $(QFLIGHT_BUILD)/qflight_stub.o
 
 # Add missing parts from libc and libstdc++
-MISSING_TOOLCHAIN_FLAGS += -DHAVE_STD_NULLPTR_T=0 -DHAVE_STD_MOVE=0 -DHAVE_STD_REMOVE_REFERENCE=0 -DHAVE_TYPE_TRAITS_H=0 -DHAVE_BYTESWAP_H=0
+MISSING_TOOLCHAIN_FLAGS += -DHAVE_STD_NULLPTR_T=0 -DHAVE_STD_MOVE=0 -DHAVE_STD_REMOVE_REFERENCE=0 -DHAVE_TYPE_TRAITS_H=0 -DHAVE_BYTESWAP_H=0 -DHAVE_ENDIAN_H=1
 
 # Hardcoded libraries/AP_Common/missing/cmath defines in "make" to retain the current behavior
 EXTRAFLAGS += -DHAVE_CMATH_ISFINITE -DNEED_CMATH_ISFINITE_STD_NAMESPACE
diff --git a/mk/board_qurt.mk b/mk/board_qurt.mk
index 8d374d15f8..f41f3eb778 100644
--- a/mk/board_qurt.mk
+++ b/mk/board_qurt.mk
@@ -33,7 +33,7 @@ OPT		= -O3
 include $(MK_DIR)/find_tools.mk
 
 # Hardcoded libraries/AP_Common/missing/cmath defines in "make" to retain the current behavior
-EXTRAFLAGS += -DHAVE_CMATH_ISFINITE -DNEED_CMATH_ISFINITE_STD_NAMESPACE
+EXTRAFLAGS += -DHAVE_CMATH_ISFINITE -DNEED_CMATH_ISFINITE_STD_NAMESPACE -DHAVE_BYTESWAP_H=1 -DHAVE_ENDIAN_H=1
 
 DEFINES        +=   -DSKETCH=\"$(SKETCH)\" -DSKETCHNAME="\"$(SKETCH)\"" -DSKETCHBOOK="\"$(SKETCHBOOK)\"" -DAPM_BUILD_DIRECTORY=APM_BUILD_$(SKETCH)
 DEFINES        +=   $(EXTRAFLAGS)
diff --git a/mk/px4_targets.mk b/mk/px4_targets.mk
index e3fd01a34e..9ad07249f1 100644
--- a/mk/px4_targets.mk
+++ b/mk/px4_targets.mk
@@ -42,6 +42,8 @@ EXTRAFLAGS += -DUAVCAN=1
 
 # Add missing parts from libc and libstdc++
 EXTRAFLAGS += -DHAVE_STD_NULLPTR_T=0
+EXTRAFLAGS += -DHAVE_ENDIAN_H=0
+EXTRAFLAGS += -DHAVE_BYTESWAP_H=0
 
 EXTRAFLAGS += -I$(BUILDROOT)/libraries/GCS_MAVLink/include/mavlink