diff --git a/hhuthesis.cls b/hhuthesis.cls
index 03022b9c81aaeaed596cb637705357f08eb42d12..8bc75d54035b134142a6bf79a733e0b7974752c7 100644
--- a/hhuthesis.cls
+++ b/hhuthesis.cls
@@ -1,5 +1,5 @@
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesClass{hhuthesis}[2021/06/28 HHU Thesis LaTeX document class v1.20]
+\ProvidesClass{hhuthesis}[2023/08/24 HHU Thesis LaTeX document class v1.21]
 
 \DeclareOption*{\PassOptionsToClass{\CurrentOption}{article}} % Options fallback.
 \ProcessOptions\relax
@@ -121,6 +121,8 @@
 \RequirePackage[scaled=0.95]{helvet}
 
 \pagestyle{headings}
+%% First page of ToC somehow forces page style to plain. This fixes it.
+\AtBeginDocument{\addtocontents{toc}{\protect\thispagestyle{headings}}}
 
 \setlength{\textwidth}{15cm}