diff --git a/doc/dox/todo.dox b/doc/dox/todo.dox
index cad6088d0d..aa5e474b4f 100644
--- a/doc/dox/todo.dox
+++ b/doc/dox/todo.dox
@@ -41,7 +41,7 @@ This page lists several todos and wishes for future version of JKQTPlotter
     <li>add instruction for unicode-characters \char"XXXX, \unicode{XXXX}, \utf8{XXXX}, \utf16{XXXX}, \utf32{XXXX} ...</li>
     <li>check sub/superscript with italic text in math mode, possibly a correction is necessary</li>
     <li>explore where QFontMetricsF::horizontalAdvance() can be used (for Qt >=5.15)</li>
-    <li></li>
+    <li>properly implement the \limits command for \sum,\prod,...</li>
     <li></li>
     <li></li>
   </ul></li>