diff --git a/lib/Froxlor/Api/Commands/Customers.php b/lib/Froxlor/Api/Commands/Customers.php
index d23d3d24..722d78c1 100644
--- a/lib/Froxlor/Api/Commands/Customers.php
+++ b/lib/Froxlor/Api/Commands/Customers.php
@@ -424,6 +424,10 @@ class Customers extends ApiCommand implements ResourceEntity
 				}
 				$allowed_phpconfigs = array_map('intval', $allowed_phpconfigs);
 
+				if (empty($allowed_phpconfigs) && $phpenabled == 1) {
+					Response::standardError('customerphpenabledbutnoconfig', '', true);
+				}
+
 				$allowed_mysqlserver = array();
 				if (! empty($p_allowed_mysqlserver) && is_array($p_allowed_mysqlserver)) {
 					foreach ($p_allowed_mysqlserver as $allowed_ms) {
@@ -1163,6 +1167,9 @@ class Customers extends ApiCommand implements ResourceEntity
 			if (!empty($allowed_phpconfigs)) {
 				$allowed_phpconfigs = array_map('intval', $allowed_phpconfigs);
 			}
+			if (empty($allowed_phpconfigs) && $phpenabled == 1) {
+				Response::standardError('customerphpenabledbutnoconfig', '', true);
+			}
 
 			// add permission for allowed mysql usage if customer was not allowed to use mysql prior
 			if ($result['mysqls'] == 0 && ($mysqls == -1 || $mysqls > 0)) {
diff --git a/lng/de.lng.php b/lng/de.lng.php
index 46be6c99..269837c1 100644
--- a/lng/de.lng.php
+++ b/lng/de.lng.php
@@ -938,6 +938,7 @@ return [
 		'gnupgextensionnotavailable' => 'Die PHP GnuPG Extension ist nicht verfügbar. PGP Schlüssel können nicht validiert werden.',
 		'invalidpgppublickey' => 'Der angegebene PGP Public Key ist ungültig',
 		'invalid_validtime' => 'Wert der valid_time in Sekunden muss zwischen 10 und 120 liegen.',
+		'customerphpenabledbutnoconfig' => 'Kunde hat PHP aktiviert aber keine PHP-Konfiguration wurde gewählt.',
 	],
 	'extras' => [
 		'description' => 'Hier können Sie zusätzliche Extras einrichten, wie zum Beispiel einen Verzeichnisschutz.<br />Die Änderungen sind erst nach einer kurzen Zeit wirksam.',
diff --git a/lng/en.lng.php b/lng/en.lng.php
index 4403ace9..263759f6 100644
--- a/lng/en.lng.php
+++ b/lng/en.lng.php
@@ -1009,6 +1009,7 @@ return [
 		'gnupgextensionnotavailable' => 'The PHP GnuPG extension is not available. Unable to validate PGP Public Key',
 		'invalidpgppublickey' => 'The PGP Public Key is not valid',
 		'invalid_validtime' => 'Valid time in seconds can only be between 10 and 120',
+		'customerphpenabledbutnoconfig' => 'Customer has PHP activated but no PHP-configuration was selected.',
 	],
 	'extras' => [
 		'description' => 'Here you can add some extras, for example directory protection.<br />The system will need some time to apply the new settings after every change.',