diff --git a/src/platforms/px4_middleware.h b/src/platforms/px4_middleware.h
index fa07b37666..462a06e97a 100644
--- a/src/platforms/px4_middleware.h
+++ b/src/platforms/px4_middleware.h
@@ -65,3 +65,5 @@ private:
 };
 
 extern bool task_should_exit;
+
+} // namespace px4