diff --git a/install_update_dovecot.sh b/install_update_dovecot.sh
index 475b93c..af7fa03 100755
--- a/install_update_dovecot.sh
+++ b/install_update_dovecot.sh
@@ -166,7 +166,7 @@ fi
 
 if $xmpp_listener ; then
    # Be compartible with older installations
-   [[ -n "$xmpp_listener_address" ]] && xmpp_listener_addresses"$xmpp_listener_address"
+   [[ -n "$xmpp_listener_address" ]] && xmpp_listener_addresses="$xmpp_listener_address"
    [[ -n "$xmpp_listener_addresses" ]] || xmpp_listener_addresses="127.0.0.1 $ipv4"
    [[ -n "$xmpp_listener_port" ]] || xmpp_listener_port="44444"
 fi