diff --git a/src/platforms/px4_defines.h b/src/platforms/px4_defines.h
index 325832f0f1..c8e2cf290b 100644
--- a/src/platforms/px4_defines.h
+++ b/src/platforms/px4_defines.h
@@ -141,9 +141,6 @@ static inline px4_param_t PX4_ROS_PARAM_SET(const char *name, float value)
  * Building for NuttX
  */
 #include <platforms/px4_includes.h>
-#ifdef __cplusplus
-#include <functional>
-#endif
 /* Main entry point */
 #define PX4_MAIN_FUNCTION(_prefix) int _prefix##_task_main(int argc, char *argv[])