diff --git a/SampleTracker.cpp b/SampleTracker.cpp
index cfb8c457c9dc136fb4bca0469a288e89dd19b3ff..aab79676daeccb659d487063e7ed886af05442a3 100644
--- a/SampleTracker.cpp
+++ b/SampleTracker.cpp
@@ -32,7 +32,7 @@ SampleTracker::SampleTracker(Settings &settings)
     _imageChanged=false;
 }
 
-void SampleTracker::track(ulong, const cv::Mat &imgOriginal) {
+void SampleTracker::track(size_t, const cv::Mat &imgOriginal) {
     //dont do nothing if we ain't got an image
     if (imgOriginal.empty()) {
         return;
@@ -62,7 +62,7 @@ void SampleTracker::track(ulong, const cv::Mat &imgOriginal) {
     _imageChanged = true;
 }
 
-void SampleTracker::paint(ProxyMat &image, const TrackingAlgorithm::View &view) {
+void SampleTracker::paint(size_t, ProxyMat &image, const TrackingAlgorithm::View &view) {
  if (view.name != _currentView || _imageChanged) {
         _currentView = view.name;
 
@@ -74,7 +74,7 @@ void SampleTracker::paint(ProxyMat &image, const TrackingAlgorithm::View &view)
     }
 }
 
-void SampleTracker::paintOverlay(QPainter *painter, View const &) {
+void SampleTracker::paintOverlay(size_t, QPainter *painter, View const &) {
     painter->drawRoundRect(QRectF(QPointF(100, 100), QPointF(1000, 1000)));
     if (_showSelectorRec) {
         drawRectangle(painter);
diff --git a/SampleTracker.h b/SampleTracker.h
index aa45170cba14d02567533eed22b7de37b0869910..a8796b0013027a8bb9074629b8a93c8b999a2313 100644
--- a/SampleTracker.h
+++ b/SampleTracker.h
@@ -13,9 +13,9 @@ class SampleTracker : public TrackingAlgorithm {
   public:
     SampleTracker(Settings &settings);
 
-    void track(ulong frameNumber, const cv::Mat &frame) override;
-    void paint(ProxyMat &m, View const &view = OriginalView) override;
-    void paintOverlay(QPainter *, View const &) override;
+    void track(size_t frameNumber, const cv::Mat &frame) override;
+    void paint(size_t frameNumber, ProxyMat &m, View const &view = OriginalView) override;
+    void paintOverlay(size_t frameNumber, QPainter *, View const &) override;
 
     void postConnect() override;