diff --git a/src/encounter/encounter_check.f90 b/src/encounter/encounter_check.f90
index ccd3d23ce..763243b81 100644
--- a/src/encounter/encounter_check.f90
+++ b/src/encounter/encounter_check.f90
@@ -1020,7 +1020,7 @@ module subroutine encounter_check_sweep_aabb_double_list(self, n1, n2, x1, v1, x
          endwhere
          llist1(:) = ext_ind_true(:) <= n1
 
-         loverlap(:) = (self%aabb(1)%ibeg(:) + 1_I8B) > (self%aabb(1)%iend(:) - 1_I8B)
+         loverlap(:) = (self%aabb(1)%ibeg(:) + 1_I8B) < (self%aabb(1)%iend(:) - 1_I8B)
          where(.not.loverlap(:)) lenc(:)%nenc = 0
 
          call timer1%start()
@@ -1124,7 +1124,7 @@ module subroutine encounter_check_sweep_aabb_single_list(self, n, x, v, renc, dt
             ext_ind_true(:) = ext_ind(:)
          endwhere
 
-         loverlap(:) = (self%aabb(1)%ibeg(:) + 1_I8B) > (self%aabb(1)%iend(:) - 1_I8B)
+         loverlap(:) = (self%aabb(1)%ibeg(:) + 1_I8B) < (self%aabb(1)%iend(:) - 1_I8B)
          where(.not.loverlap(:)) lenc(:)%nenc = 0
 
          call timer1%start()