diff --git a/Tracking/TrkEvent/TrkNeutralParameters/src/NeutralParameters.cxx b/Tracking/TrkEvent/TrkNeutralParameters/src/NeutralParameters.cxx
index a88e474d24f81466cbe5b9e3cfa4c09d537b5aa4..4c0b97370cf96e1d12a15efd308d7ce7ab3224a7 100644
--- a/Tracking/TrkEvent/TrkNeutralParameters/src/NeutralParameters.cxx
+++ b/Tracking/TrkEvent/TrkNeutralParameters/src/NeutralParameters.cxx
@@ -14,7 +14,7 @@ namespace Trk {
  template class ParametersT<5,Neutral,ConeSurface>;
  template class ParametersT<5,Neutral,PerigeeSurface>;
  template class ParametersT<5,Neutral,StraightLineSurface>;
- template class CurvilinearParametersT<5,Neutral,PlaneSurface>;
+  template class CurvilinearParametersT<5,Neutral,PlaneSurface>;
 
 }