diff --git a/makefiles/qurt/toolchain_hexagon.mk b/makefiles/qurt/toolchain_hexagon.mk
index 46696bd080..556c2e21dc 100644
--- a/makefiles/qurt/toolchain_hexagon.mk
+++ b/makefiles/qurt/toolchain_hexagon.mk
@@ -132,6 +132,7 @@ ARCHDEFINES		+= -DCONFIG_ARCH_BOARD_$(CONFIG_BOARD) \
 			    -I$(HEXAGON_TOOLS_ROOT)/gnu/hexagon/include \
 			    -I$(PX4_BASE)/src/lib/eigen \
 			    -I$(PX4_BASE)/src/platforms/qurt/include \
+			    -I$(PX4_BASE)/src/platforms/posix/include \
 			    -I$(PX4_BASE)/mavlink/include/mavlink \
 			    -I$(QURTLIB)/..//include \
 			    -I$(HEXAGON_SDK_ROOT)/inc \