diff --git a/corsika/setup/SetupTrajectory.hpp b/corsika/setup/SetupTrajectory.hpp
index fdbfcbeaa4d0a678a15583c5ceef93d3b5d3c31f..f531414f65efa805132de31f6e7535b96ab89da6 100644
--- a/corsika/setup/SetupTrajectory.hpp
+++ b/corsika/setup/SetupTrajectory.hpp
@@ -38,15 +38,15 @@ namespace corsika::setup {
      The default tracking algorithm.
    */
 
-  // typedef corsika::process::tracking_leapfrog_curved::Tracking Tracking;
+  typedef corsika::process::tracking_leapfrog_curved::Tracking Tracking;
   // typedef corsika::process::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::geometry::LeapFrogTrajectory Trajectory;
+  // typedef StraightTrajectory Trajectory;
+  typedef corsika::geometry::LeapFrogTrajectory Trajectory;
 
 } // namespace corsika::setup