diff --git a/lib/pivotstate/pivotstate.class.php b/lib/pivotstate/pivotstate.class.php
index d3521ffadc..72bf987260 100644
--- a/lib/pivotstate/pivotstate.class.php
+++ b/lib/pivotstate/pivotstate.class.php
@@ -460,6 +460,12 @@ class pivotState
         $this->sqlBuilder['joins'][] = $join;
     }
 
+    /**
+     * Get next table alias.
+     *
+     * @access public
+     * @return string
+     */
     public function getNextTableAlias()
     {
         $joins = $this->sqlBuilder['joins'];