diff --git a/completion/available/drush.completion.bash b/completion/available/drush.completion.bash
new file mode 100644
index 0000000..a65def6
--- /dev/null
+++ b/completion/available/drush.completion.bash
@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+#
+# bash completion support for Drush:
+#   https://github.com/drush-ops/drush
+#
+# Originally from:
+#   http://github.com/drush-ops/drush/blob/master/drush.complete.sh
+
+# Ensure drush is available.
+which drush > /dev/null || alias drush &> /dev/null || return
+
+__drush_ps1() {
+  f="${TMPDIR:-/tmp/}/drush-env/drush-drupal-site-$$"
+  if [ -f $f ]
+  then
+    __DRUPAL_SITE=$(cat "$f")
+  else
+    __DRUPAL_SITE="$DRUPAL_SITE"
+  fi
+
+  [[ -n "$__DRUPAL_SITE" ]] && printf "${1:- (%s)}" "$__DRUPAL_SITE"
+}
+
+# Completion function, uses the "drush complete" command to retrieve
+# completions for a specific command line COMP_WORDS.
+_drush_completion() {
+  # Set IFS to newline (locally), since we only use newline separators, and
+  # need to retain spaces (or not) after completions.
+  local IFS=$'\n'
+  # The '< /dev/null' is a work around for a bug in php libedit stdin handling.
+  # Note that libedit in place of libreadline in some distributions. See:
+  # https://bugs.launchpad.net/ubuntu/+source/php5/+bug/322214
+  COMPREPLY=( $(drush --early=includes/complete.inc "${COMP_WORDS[@]}" < /dev/null 2> /dev/null) )
+}
+
+# Register our completion function. We include common short aliases for Drush.
+complete -o bashdefault -o default -o nospace -F _drush_completion d dr drush drush5 drush6 drush6 drush.php