diff --git a/phpBB/admin/admin_forumauth.php b/phpBB/admin/admin_forumauth.php
index d0b8f9b395..1a2fb4c4b0 100644
--- a/phpBB/admin/admin_forumauth.php
+++ b/phpBB/admin/admin_forumauth.php
@@ -109,7 +109,7 @@ if( isset($HTTP_POST_VARS['submit']) )
 				$sql .= ( ( $sql != '' ) ? ', ' : '' ) . $forum_auth_fields[$i] . ' = ' . $simple_ary[$i];
 			}
 
-			$sql .= " WHERE forum_id = $forum_id";
+			$sql = "UPDATE " . FORUMS_TABLE . " SET $sql WHERE forum_id = $forum_id";
 		}
 		else
 		{