diff --git a/lib/doc/pl/Additional.lyx b/lib/doc/pl/Additional.lyx
index 73ba41229a..5d43e27575 100644
--- a/lib/doc/pl/Additional.lyx
+++ b/lib/doc/pl/Additional.lyx
@@ -114,8 +114,8 @@ End
 \shortcut idx
 \color #008000
 \end_index
-\secnumdepth 2
-\tocdepth 2
+\secnumdepth 3
+\tocdepth 3
 \paragraph_separation indent
 \paragraph_indentation default
 \quotes_language german