diff --git a/lib/os/class.ISPConfigDebianOS.inc.php b/lib/os/class.ISPConfigDebianOS.inc.php
index e4d9b5e56fef999176549f4b012f17000ae273fb..b21f7e7d176aa0bad275dc6274794b0144b10e27 100644
--- a/lib/os/class.ISPConfigDebianOS.inc.php
+++ b/lib/os/class.ISPConfigDebianOS.inc.php
@@ -207,7 +207,7 @@ class ISPConfigDebianOS extends ISPConfigBaseOS {
 	}
 
 	protected function getApacheModulesToEnable() {
-		$modules = array('suexec', 'rewrite', 'ssl', 'actions', 'include', 'dav_fs', 'dav', 'auth_digest', 'cgi', 'headers', 'proxy_fcgi', 'alias', 'http2', 'mpm_event');
+		$modules = array('suexec', 'rewrite', 'ssl', 'actions', 'include', 'dav_fs', 'dav', 'auth_digest', 'cgi', 'headers', 'proxy_fcgi', 'proxy_http',  'alias', 'http2', 'mpm_event');
 
 		return $modules;
 	}