diff --git a/README.markdown b/README.markdown
index de09c11..1c3d3d6 100644
--- a/README.markdown
+++ b/README.markdown
@@ -1,11 +1,14 @@
 # Indent Guides
-Indent Guides is a plugin for visually displaying indent levels in vim.
+Indent Guides is a plugin for visually displaying indent levels in gvim.
 
 ## Features:
 * Can detect both tab and space indent styles.
 * Automatically inspects your colorscheme and picks appropriate colors.
 * Will highlight indent levels with alternating colors.
 
+## Requirements
+* gvim 7.2+ (support for terminal vim is planned for a future release)
+
 ## Installation
 To install the plugin just copy `autoload`, `plugin`, `doc` directories into your .vim directory.
 
diff --git a/doc/indent_guides.txt b/doc/indent_guides.txt
index f57bf33..83df7de 100644
--- a/doc/indent_guides.txt
+++ b/doc/indent_guides.txt
@@ -1,4 +1,4 @@
-*indent_guides.txt*  A plugin for visually displaying indent levels in vim.
+*indent_guides.txt*  A plugin for visually displaying indent levels in gvim.
 
                                                                  *indent-guides*
       ____           __            __     ______       _      __
@@ -26,13 +26,17 @@ CONTENTS                                                *indent-guides-contents*
 ==============================================================================
 1. INTRODUCTION                                     *indent-guides-introduction*
 
-Indent Guides is a plugin for visually displaying indent levels in vim.
+Indent Guides is a plugin for visually displaying indent levels in gvim.
 
 Features:~
   * Can detect both tab and space indent styles.
   * Automatically inspects your colorscheme and picks appropriate colors.
   * Will highlight indent levels with alternating colors.
 
+Note:~
+This plugin only works with gvim at the moment. Support for terminal vim is
+planned for a future release.
+
 ==============================================================================
 2. COMMANDS                                             *indent-guides-commands*