diff --git a/Tracker/TrackerRecAlgs/TrackerSeedFinder/src/TrackerSeedFinder.cxx b/Tracker/TrackerRecAlgs/TrackerSeedFinder/src/TrackerSeedFinder.cxx
index ffa96a4cdfc06a6ba51d041c3f1b375718148c7b..b0f81cdb91f0c7b1cebbce09d5977332c4fa129f 100755
--- a/Tracker/TrackerRecAlgs/TrackerSeedFinder/src/TrackerSeedFinder.cxx
+++ b/Tracker/TrackerRecAlgs/TrackerSeedFinder/src/TrackerSeedFinder.cxx
@@ -32,8 +32,9 @@
 //#include "Acts/EventData/TrackParameters.hpp"
 #include "TrackerReadoutGeometry/SCT_DetectorManager.h"
 #include "Acts/Utilities/detail/periodic.hpp"
-#include "Acts/Utilities/Definitions.hpp"
-#include "Acts/Utilities/Units.hpp"
+#include "Acts/Definitions/Common.hpp"
+#include "Acts/Definitions/Algebra.hpp"
+#include "Acts/Definitions/Units.hpp"
 using namespace Acts::UnitLiterals;
 //!!!!!!!!!!!!!!!!!!!!!!!!
 namespace Tracker