diff --git a/README.markdown b/README.markdown
index 19b841b..48d216b 100644
--- a/README.markdown
+++ b/README.markdown
@@ -59,7 +59,7 @@ Installation
 
     git clone https://github.com/scrooloose/nerdtree.git ~/.vim/bundle/nerdtree
 
-Then reload vim, run `:helptags ~/.vim/bundle/nerdtree/doc/`, and check out `:help NERD_tree.txt`.
+Then reload Vim, run `:helptags ~/.vim/bundle/nerdtree/doc/`, and check out `:help NERDTree.txt`.
 
 
 #### [apt-vim](https://github.com/egalpin/apt-vim)
diff --git a/doc/NERD_tree.txt b/doc/NERDTree.txt
similarity index 99%
rename from doc/NERD_tree.txt
rename to doc/NERDTree.txt
index 427e90c..f68880c 100644
--- a/doc/NERD_tree.txt
+++ b/doc/NERDTree.txt
@@ -1,4 +1,4 @@
-*NERD_tree.txt*   A tree explorer plugin that owns your momma!
+*NERDTree.txt*   A tree explorer plugin that owns your momma!