diff --git a/src/opt_delete.f90 b/src/opt_delete.f90
index b2f79bf..e099a76 100644
--- a/src/opt_delete.f90
+++ b/src/opt_delete.f90
@@ -127,7 +127,7 @@ module opt_delete
 
                                         !Now zero out the larger index
                                         if(first) then 
-                                            if(i > nei) then 
+                                            if(i < nei) then 
                                                 which_cell(:,i) = 0
                                                 cycle atom_loop
                                             else
@@ -135,7 +135,7 @@ module opt_delete
                                                 cell_list(num_nei,c(1) + ck, c(2) + cj, c(3) + ci) = 0
                                             end if
                                         else
-                                            if(i < nei) then 
+                                            if(i > nei) then 
                                                 which_cell(:,i) = 0
                                                 cycle atom_loop
                                             else