diff --git a/corsika/setup/SetupTrajectory.hpp b/corsika/setup/SetupTrajectory.hpp
index 95a91115b0aa422c860448fa8057d70c35f95456..24a51f79c68c937189860f9ddd8b7e0832cc2a15 100644
--- a/corsika/setup/SetupTrajectory.hpp
+++ b/corsika/setup/SetupTrajectory.hpp
@@ -38,15 +38,15 @@ namespace corsika::setup {
      The default tracking algorithm.
    */
 
-  typedef corsika::tracking_leapfrog_curved::Tracking Tracking;
+  //typedef corsika::tracking_leapfrog_curved::Tracking Tracking;
   // typedef corsika::tracking_leapfrog_straight::Tracking Tracking;
-  // typedef corsika::tracking_line::Tracking Tracking;
+  typedef corsika::tracking_line::Tracking Tracking;
 
   /**
    The default trajectory.
   */
   /// definition of Trajectory base class, to be used in tracking and cascades
-  // typedef StraightTrajectory Trajectory;
-  typedef corsika::LeapFrogTrajectory Trajectory;
+  typedef StraightTrajectory Trajectory;
+  //typedef corsika::LeapFrogTrajectory Trajectory;
 
 } // namespace corsika::setup