diff --git a/src/platforms/px4_middleware.h b/src/platforms/px4_middleware.h
index b0bc404173..16e73ec04a 100644
--- a/src/platforms/px4_middleware.h
+++ b/src/platforms/px4_middleware.h
@@ -59,7 +59,7 @@ extern bool task_should_exit;
 /**
  * Returns true if the app/task should continue to run
  */
-inline bool ok() { return !task_should_exit; }
+__EXPORT inline bool ok() { return !task_should_exit; }
 #endif
 
 class Rate