diff --git a/setup/check_install.php b/setup/check_install.php
index 2d447c7a2c..d3f4faccb3 100644
--- a/setup/check_install.php
+++ b/setup/check_install.php
@@ -222,6 +222,10 @@ $checks = array(
 		'func' => 'extension_check',
 		'error' => lang('The json extension is required by EGroupware for AJAX.'),
 	),
+	'zip' => array(
+		'func' => 'extension_check',
+		'warning' => lang('The zip extension is required for merge-print with office documents.'),
+	),
 	'tidy' => array(
 		'func' => 'extension_check',
 		'warning' => lang('The tidy extension is need in merge-print to clean up html before inserting it in office documents.'),
diff --git a/setup/lang/egw_de.lang b/setup/lang/egw_de.lang
index 9b26800787..741e32cfd6 100644
--- a/setup/lang/egw_de.lang
+++ b/setup/lang/egw_de.lang
@@ -620,6 +620,7 @@ the tables	setup	de	die Tabellen
 the tidy extension is need in merge-print to clean up html before inserting it in office documents.	setup	de	Die tidy PHP Erweiterung wird im Sammeldruck benötigt um HTML zu reinigen bevor es in Office Dokumente eingefügt wird.
 the username/passwords are: demo/guest, demo2/guest and demo3/guest.	setup	de	Die Benutzernamen/Passworte sind: demo/guest, demo2/guest und demo3/guest
 the xmlreader extension is required by egroupware in several applications.	setup	de	Die xmlreader PHP Erweiterung wird in EGroupware von vielen Anwendungen benötigt.
+the zip extension is required for merge-print with office documents.	setup	de	Die PHP Erweiterung zip ist für den Sammeldruck von Office Dateien zwingend erforderlich.
 there was a problem trying to connect to your ldap server. <br />	setup	de	Es gab ein Problem eine Verbindung zu Ihrem LDAP-Server herzustellen.<br />
 there was a problem trying to connect to your ldap server. <br />please check your ldap server configuration	setup	de	Es gab ein Problem eine Verbindung zu Ihrem LDAP-Server herzustellen.<br />Bitte überprüfen Sie die Konfiguration Ihres LDAP-Servers.
 this has to be outside the webservers document-root!!!	setup	de	Muss außerhalb des Wurzelverzeichnisses (document root) des Webservers sein!!!
diff --git a/setup/lang/egw_en.lang b/setup/lang/egw_en.lang
index 1f6b2ea8f6..c09ee2b3ed 100644
--- a/setup/lang/egw_en.lang
+++ b/setup/lang/egw_en.lang
@@ -620,6 +620,7 @@ the tables	setup	en	the tables
 the tidy extension is need in merge-print to clean up html before inserting it in office documents.	setup	en	The tidy extension is need in merge-print to clean up html before inserting it in office documents.
 the username/passwords are: demo/guest, demo2/guest and demo3/guest.	setup	en	The username/passwords are: demo/guest, demo2/guest and demo3/guest.
 the xmlreader extension is required by egroupware in several applications.	setup	en	The xmlreader extension is required by EGroupware in several applications.
+the zip extension is required for merge-print with office documents.	setup	en	The zip extension is required for merge-print with office documents.
 there was a problem trying to connect to your ldap server. <br />	setup	en	There was a problem trying to connect to your LDAP server. <br />
 there was a problem trying to connect to your ldap server. <br />please check your ldap server configuration	setup	en	There was a problem trying to connect to your LDAP server. <br />please check your LDAP server configuration
 this has to be outside the webservers document-root!!!	setup	en	This has to be outside the web servers document-root!