diff --git a/lib/Cpdf.php b/lib/Cpdf.php
index 3d068ddfe..2ec44714a 100644
--- a/lib/Cpdf.php
+++ b/lib/Cpdf.php
@@ -951,7 +951,14 @@ protected function o_font($id, $action, $options = '')
         return null;
     }
 
-    protected function o_toUnicode($id, $action, $options = '')
+    /**
+     * A toUnicode section, needed for unicode fonts
+     *
+     * @param $id
+     * @param $action
+     * @return null|string
+     */
+    protected function o_toUnicode($id, $action)
     {
         switch ($action) {
             case 'new':
@@ -1213,7 +1220,14 @@ protected function o_fontDescendentCID($id, $action, $options = '')
         return null;
     }
 
-    protected function o_cidSystemInfo($id, $action, $options = '')
+    /**
+     * CID system info section, needed for unicode fonts
+     *
+     * @param $id
+     * @param $action
+     * @return null|string
+     */
+    protected function o_cidSystemInfo($id, $action)
     {
         switch ($action) {
             case 'new':