diff --git a/data/bash-completion.in b/data/bash-completion.in
index b8fe365..cff8fa7 100644
--- a/data/bash-completion.in
+++ b/data/bash-completion.in
@@ -1,5 +1,6 @@
+#!/bin/bash
 _zathura() {
-  _init_completion || return
+  _init_completion 2>/dev/null || true
 
   local EXTS=""
   for PLUGIN in @PLUGINDIR@/lib*.so; do
@@ -22,6 +23,6 @@ _zathura() {
     esac
   done
 
-  _filedir "${EXTS#|}"
+  _filedir "${EXTS#|}" 2>/dev/null || COMPREPLY=($(shopt -s extglob; compgen -f -X "!*.@($EXTS)"))
 }
 complete -F _zathura zathura