diff --git a/actions/admin/settings/135.fcgid.php b/actions/admin/settings/135.fcgid.php
index ed828480..1942a76b 100644
--- a/actions/admin/settings/135.fcgid.php
+++ b/actions/admin/settings/135.fcgid.php
@@ -28,6 +28,7 @@ return array(
 					'type' => 'bool',
 					'default' => false,
 					'save_method' => 'storeSettingField',
+					'plausibility_check_method' => 'checkFcgidPhpFpm',
 					'overview_option' => true
 					),					
 				'system_mod_fcgid_configdir' => array(
diff --git a/actions/admin/settings/136.phpfpm.php b/actions/admin/settings/136.phpfpm.php
index 4d18383b..d8de4fd1 100644
--- a/actions/admin/settings/136.phpfpm.php
+++ b/actions/admin/settings/136.phpfpm.php
@@ -27,6 +27,7 @@ return array(
 					'type' => 'bool',
 					'default' => false,
 					'save_method' => 'storeSettingField',
+					'plausibility_check_method' => 'checkFcgidPhpFpm',
 					'overview_option' => true
 					),		
 				'system_phpfpm_configdir' => array(
diff --git a/lib/functions/validate/function.checkFcgidPhpFpm.php b/lib/functions/validate/function.checkFcgidPhpFpm.php
new file mode 100644
index 00000000..594c7c3c
--- /dev/null
+++ b/lib/functions/validate/function.checkFcgidPhpFpm.php
@@ -0,0 +1,44 @@
+<?php
+
+/**
+ * This file is part of the Froxlor project.
+ * Copyright (c) 2010 the Froxlor Team (see authors).
+ *
+ * For the full copyright and license information, please view the COPYING
+ * file that was distributed with this source code. You can also view the
+ * COPYING file online at http://files.froxlor.org/misc/COPYING.txt
+ *
+ * @copyright  (c) the authors
+ * @author     Froxlor team <team@froxlor.org> (2010-)
+ * @license    GPLv2 http://files.froxlor.org/misc/COPYING.txt
+ * @package    Functions
+ * @version    $Id$
+ */
+
+function checkFcgidPhpFpm($fieldname, $fielddata, $newfieldvalue, $allnewfieldvalues)
+{
+	global $settings;
+
+	$returnvalue = array(FORMFIELDS_PLAUSIBILITY_CHECK_OK);
+
+	/*
+	 * check whether fcgid should be enabled but php-fpm is
+	 */
+	if($fieldname == 'system_mod_fcgid_enabled'
+		&& (int)$newfieldvalue == 1
+		&& (int)$settings['phpfpm']['enabled'] == 1
+	) {
+		$returnvalue = array(FORMFIELDS_PLAUSIBILITY_CHECK_ERROR, 'phpfpmstillenabled');
+	}
+	/*
+	 * check whether php-fpm should be enabled but fcgid is
+	 */
+	elseif($fieldname == 'system_phpfpm_enabled'
+		&& (int)$newfieldvalue == 1
+		&& (int)$settings['system']['mod_fcgid'] == 1
+	) {
+		$returnvalue = array(FORMFIELDS_PLAUSIBILITY_CHECK_ERROR, 'fcgidstillenabled');
+	}
+
+	return $returnvalue;
+}
diff --git a/lng/english.lng.php b/lng/english.lng.php
index 7ac37e3f..927a5c35 100644
--- a/lng/english.lng.php
+++ b/lng/english.lng.php
@@ -1541,3 +1541,5 @@ $lng['serversettings']['phpfpm_settings']['max_spare_servers']['title'] = 'The d
 $lng['serversettings']['phpfpm_settings']['max_spare_servers']['description'] = 'Note: Used only when pm is set to \'dynamic\'<br />Note: Mandatory when pm is set to \'dynamic\'';
 $lng['serversettings']['phpfpm_settings']['max_requests']['title'] = 'Requests per child before respawning';
 $lng['serversettings']['phpfpm_settings']['max_requests']['description'] = 'For endless request processing specify \'0\'. Equivalent to PHP_FCGI_MAX_REQUESTS.';
+$lng['error']['phpfpmstillenabled'] = 'PHP-FPM is currently active. Please deactivate it before activating FCGID';
+$lng['error']['fcgidstillenabled'] = 'FCGID is currently active. Please deactivate it before activating PHP-FPM';
diff --git a/lng/german.lng.php b/lng/german.lng.php
index 80631d41..c7f471d7 100644
--- a/lng/german.lng.php
+++ b/lng/german.lng.php
@@ -1523,3 +1523,5 @@ $lng['serversettings']['phpfpm_settings']['max_spare_servers']['title'] = 'Maxim
 $lng['serversettings']['phpfpm_settings']['max_spare_servers']['description'] = 'Hinweis: Nur wenn PM auf \'dynamic\' steht<br />Wichtig: Pflichtangabe wenn PM auf \'dynamic\' steht';
 $lng['serversettings']['phpfpm_settings']['max_requests']['title'] = 'Requests pro Kindprozess bevor Neuerstellung (respawning)';
 $lng['serversettings']['phpfpm_settings']['max_requests']['description'] = 'F&uuml;r keine Begrenzung \'0\' angeben. Equivalent zu PHP_FCGI_MAX_REQUESTS.';
+$lng['error']['phpfpmstillenabled'] = 'PHP-FPM ist derzeit aktiviert. Bitte deaktiviere es, um FCGID zu aktivieren';
+$lng['error']['fcgidstillenabled'] = 'FCGID ist derzeit aktiviert. Bitte deaktiviere es, um PHP-FPM zu aktivieren';