diff --git a/platforms/common/uORB/uORBManager.hpp b/platforms/common/uORB/uORBManager.hpp
index c975574758cf..a47e3213b0fd 100644
--- a/platforms/common/uORB/uORBManager.hpp
+++ b/platforms/common/uORB/uORBManager.hpp
@@ -659,7 +659,7 @@ class Manager
 			{
 				px4_sem_init(&_sem, 1, 0);
 				px4_sem_init(&_lock, 1, 1);
-#if __PX4_NUTTX
+#if defined(__PX4_NUTTX)
 				sem_setprotocol(&_sem, SEM_PRIO_NONE);
 				sem_setprotocol(&_lock, SEM_PRIO_NONE);
 #endif