diff --git a/plugin/makecols.vim b/plugin/makecols.vim
index b1cf572..4602332 100644
--- a/plugin/makecols.vim
+++ b/plugin/makecols.vim
@@ -26,7 +26,7 @@ function! s:get_visual_selection()
         if (c == 0)
             let new_string = lines[i]
         else
-            if (i % no_of_cols)
+            if (c % no_of_cols)
                 let new_string = join([new_string, lines[i]], "\t")
             else
                 let new_string = join([new_string, lines[i]], "\n")