diff --git a/doc/NERD_tree.txt b/doc/NERD_tree.txt
index 4b6e38f..071f6a2 100644
--- a/doc/NERD_tree.txt
+++ b/doc/NERD_tree.txt
@@ -477,6 +477,9 @@ NERD tree. These options should be set in your vimrc.
 |NERDTreeShowHidden|            Tells the NERD tree whether to display hidden
                                 files on startup.
 
+|NERDTreeShowLineNumbers|       Tells the NERD tree whether to display line
+                                numbers in the tree window.
+
 |NERDTreeSortOrder|             Tell the NERD tree how to sort the nodes in
                                 the tree.
 
@@ -658,6 +661,17 @@ Use one of the follow lines to set this option: >
     let NERDTreeShowHidden=0
     let NERDTreeShowHidden=1
 <
+
+------------------------------------------------------------------------------
+                                                     *NERDTreeShowLineNumbers*
+Values: 0 or 1.
+Default: 0.
+
+This option tells vim whether to display line numbers for the NERD tree
+window.  Use one of the follow lines to set this option: >
+    let NERDTreeShowLineNumbers=0
+    let NERDTreeShowLineNumbers=1
+<
                                                        
 ------------------------------------------------------------------------------
                                                            *NERDTreeSortOrder*