diff --git a/src/particle_header.F90 b/src/particle_header.F90
index 692f7de357..076f6d1bcb 100644
--- a/src/particle_header.F90
+++ b/src/particle_header.F90
@@ -23,9 +23,8 @@ module particle_header
      real(8) :: xyz(3)
      real(8) :: uvw(3)
 
-     ! Pointers to next (lower) and previous (higher) universe
+     ! Pointer to next (more local) set of coordinates
      type(LocalCoord), pointer :: next => null()
-     type(LocalCoord), pointer :: prev => null()
   end type LocalCoord
      
 !===============================================================================