diff --git a/doc/dox/todo.dox b/doc/dox/todo.dox
index aac2ab7f7d..72f9ce7263 100644
--- a/doc/dox/todo.dox
+++ b/doc/dox/todo.dox
@@ -42,7 +42,7 @@ This page lists several todos and wishes for future version of JKQTPlotter
     <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>correction of frac-height (2*maxHeight or height1+height2) should be done by brace-node, not frac-node</li>
-    <li></li>
+    <li>properly implement the \limits command for \sum,\prod,...</li>
     <li></li>
   </ul></li>
 </ul>