diff --git a/_toc.yml b/_toc.yml
index 440bd54b10315ea1173c82668ff3eda19088355c..8302af8f6bb19651046358d0b72d98fd77a37793 100644
--- a/_toc.yml
+++ b/_toc.yml
@@ -40,4 +40,5 @@ parts:
 
 - caption: Maschinelles Lernen
   numbered: true
+  chapters:
   - file: kmeans
\ No newline at end of file