diff --git a/src/MissionManager/MissionManager.h b/src/MissionManager/MissionManager.h
index 830344d5addac360156fecb8fa8705819f92d13c..ec1ed967862690f6648cf65a5837c9843979924f 100644
--- a/src/MissionManager/MissionManager.h
+++ b/src/MissionManager/MissionManager.h
@@ -128,7 +128,7 @@ private:
     
     QmlObjectListModel  _missionItems;
     
-    static const int _ackTimeoutMilliseconds= 500;
+    static const int _ackTimeoutMilliseconds= 2000;
     static const int _maxRetryCount = 5;
 };