diff --git a/canframemodel.cpp b/canframemodel.cpp
index 57d542d..02fc0cf 100644
--- a/canframemodel.cpp
+++ b/canframemodel.cpp
@@ -282,8 +282,9 @@ QVariant CANFrameModel::headerData(int section, Qt::Orientation orientation,
 }
 
 
-void CANFrameModel::addFrame(CANFrame frame, bool autoRefresh = false)
+void CANFrameModel::addFrame(CANFrame& frame, bool autoRefresh = false)
 {
+    /*TODO: remove mutex */
     mutex.lock();
     CANFrame tempFrame;
     tempFrame = frame;
diff --git a/canframemodel.h b/canframemodel.h
index f53db11..ddea3ce 100644
--- a/canframemodel.h
+++ b/canframemodel.h
@@ -46,7 +46,7 @@ public:
     const QMap<int, bool> *getFiltersReference() const; //this neither
 
 public slots:
-    void addFrame(CANFrame, bool);
+    void addFrame(CANFrame&, bool);
 
 signals:
     void updatedFiltersList();