diff --git a/src/comm/MockLinkMissionItemHandler.cc b/src/comm/MockLinkMissionItemHandler.cc
index 305e1050ebb1fdbf8733882c9f749e41bdfc3cf3..07626c0e499d9aa9544238a25a8dacf1fbeadcd8 100644
--- a/src/comm/MockLinkMissionItemHandler.cc
+++ b/src/comm/MockLinkMissionItemHandler.cc
@@ -70,8 +70,11 @@ bool MockLinkMissionItemHandler::handleMessage(const mavlink_message_t& msg)
         break;
 
     case MAVLINK_MSG_ID_MISSION_CLEAR_ALL:
-        // Delete all mission items
+        // Delete all plan items
         _missionItems.clear();
+        _fenceItems.clear();
+        _rallyItems.clear();
+        _sendAck(MAV_MISSION_ACCEPTED);
         break;
 
     default: