diff --git a/src/modules/simulator/simulator.h b/src/modules/simulator/simulator.h
index f42baaf5ac..a9b7e84e95 100644
--- a/src/modules/simulator/simulator.h
+++ b/src/modules/simulator/simulator.h
@@ -38,7 +38,7 @@
 
 #pragma once
 
-#include <semaphore.h>
+#include <px4_posix.h>
 #include <uORB/topics/hil_sensor.h>
 #include <uORB/topics/manual_control_setpoint.h>
 #include <uORB/topics/actuator_outputs.h>