diff --git a/lib/classes/api/commands/class.Customers.php b/lib/classes/api/commands/class.Customers.php
index 1f109629..2b3d9b75 100644
--- a/lib/classes/api/commands/class.Customers.php
+++ b/lib/classes/api/commands/class.Customers.php
@@ -265,7 +265,6 @@ class Customers extends ApiCommand implements ResourceEntity
 				$customernumber = validate($customernumber, 'customer number', '/^[A-Za-z0-9 \-]*$/Di', '', array(), true);
 				$def_language = validate($def_language, 'default language', '', '', array(), true);
 				$custom_notes = validate(str_replace("\r\n", "\n", $custom_notes), 'custom_notes', '/^[^\0]*$/', '', array(), true);
-				$allowed_phpconfigs = array_map('intval', $allowed_phpconfigs);
 
 				if (Settings::Get('system.mail_quota_enabled') != '1') {
 					$email_quota = - 1;
@@ -294,6 +293,7 @@ class Customers extends ApiCommand implements ResourceEntity
 						$allowed_phpconfigs[] = $allowed_phpconfig;
 					}
 				}
+				$allowed_phpconfigs = array_map('intval', $allowed_phpconfigs);
 
 				$diskspace = $diskspace * 1024;
 				$traffic = $traffic * 1024 * 1024;