diff --git a/phpBB/phpbb/profilefields/lang_helper.php b/phpBB/phpbb/profilefields/lang_helper.php
index 9e4991e94a..b950ace872 100644
--- a/phpBB/phpbb/profilefields/lang_helper.php
+++ b/phpBB/phpbb/profilefields/lang_helper.php
@@ -78,6 +78,7 @@ class lang_helper
 				{
 					$field_id[$k] = (int) $id;
 				}
+				$field_id = array_unique($field_id);
 			}
 			else
 			{