diff --git a/dotfiles/shell/aliases b/dotfiles/shell/aliases
index 201e541..a29e028 100644
--- a/dotfiles/shell/aliases
+++ b/dotfiles/shell/aliases
@@ -1,9 +1,11 @@
+#!/bin/bash
+
 # aliases common to bash and zsh
 
 alias lime2connect='ssh $USER@2px.info'
 alias git-summary='~/github_misc/git-summary/git-summary'
 
-# enable color support of ls and also add handy aliases
+# color support for ls and grep
 if [ -x /usr/bin/dircolors ]; then
     test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
     alias ls='ls --color=auto'