diff --git a/README.mkd b/README.mkd
index 32a22bf..940c8a2 100644
--- a/README.mkd
+++ b/README.mkd
@@ -310,7 +310,6 @@ Here are some things you can check:
 * Your Vim supports signs (`:echo has('signs')` should give `1`).
 * Your file is being tracked by git and has unstaged, saved changes.
 * If you use the Fish shell, or another non-POSIX shell, add `set shell=/bin/bash` to your `~/.vimrc`.
-* Make sure your grep produces colourless output, e.g. with `export GREP_OPTIONS='--color=auto'`.
 
 
 ### Shameless Plug
diff --git a/autoload/gitgutter/diff.vim b/autoload/gitgutter/diff.vim
index 6ca9f1c..8da3ba9 100644
--- a/autoload/gitgutter/diff.vim
+++ b/autoload/gitgutter/diff.vim
@@ -1,5 +1,5 @@
 let s:grep_available = executable('grep')
-let s:grep_command = ' | '.(g:gitgutter_escape_grep ? '\grep' : 'grep').' -e '.gitgutter#utility#shellescape('^@@ ')
+let s:grep_command = ' | '.(g:gitgutter_escape_grep ? '\grep' : 'grep').' --color=never -e '.gitgutter#utility#shellescape('^@@ ')
 let s:hunk_re = '^@@ -\(\d\+\),\?\(\d*\) +\(\d\+\),\?\(\d*\) @@'