diff --git a/GBL/include/GblTrackSegmentController.h b/GBL/include/GblTrackSegmentController.h
index 5e57fcd4120dcc97c4f40fb0c54695d981a46eb0..b07a142634e1c8ceb04984d7a7de558711fdda85 100644
--- a/GBL/include/GblTrackSegmentController.h
+++ b/GBL/include/GblTrackSegmentController.h
@@ -47,7 +47,7 @@ namespace genfit {
     
     virtual GblTrackSegmentController* clone() const {return new GblTrackSegmentController(*this);}
     
-    virtual void controlTrackSegment(TVector3, TVector3, GblFitter *) {;}
+    virtual void controlTrackSegment(TVector3, TVector3, double, GblFitter *) {;}
     
     virtual void Print(const Option_t* = "") const {;}