diff --git a/admin_manual/installation/source_installation.rst b/admin_manual/installation/source_installation.rst
index 9ac2c4ef5..92340af4e 100644
--- a/admin_manual/installation/source_installation.rst
+++ b/admin_manual/installation/source_installation.rst
@@ -26,6 +26,7 @@ To run ownCloud, your web server must have the following installed:
 * PHP module libxml
 * PHP module mb multibyte
 * PHP module SimpleXML
+* PHP module XMLWriter
 * PHP module zip
 * PHP module zlib