diff --git a/src/Model/Connection/GwtInterfaceModel.f90 b/src/Model/Connection/GwtInterfaceModel.f90
index 228a8d9c29f..87967ee6e02 100644
--- a/src/Model/Connection/GwtInterfaceModel.f90
+++ b/src/Model/Connection/GwtInterfaceModel.f90
@@ -97,7 +97,6 @@ subroutine allocate_scalars(this, modelname)
     class(GwtInterfaceModelType) :: this !< the GWT interface model
     character(len=*), intent(in) :: modelname !< the model name
 
-    call this%GwtModelType%allocate_tsp_scalars(modelname)
     call this%GwtModelType%allocate_gwt_scalars(modelname)
 
     call mem_allocate(this%iAdvScheme, 'ADVSCHEME', this%memoryPath)