diff --git a/docs/index.rst b/docs/index.rst
index eaec1d855dd477afc6e1f8d3ee22cea45da08185..0bf5fbd9f1a12e00ad9d868c287cce64cb72b0dd 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -37,6 +37,7 @@ Please feel free to contact me or just open an issue on Gitlab / Github if you h
    :caption: Contents:
 
    getting_started
+   orcasong_plag
    CONTRIBUTING
    Source (Git) <https://git.km3net.de/ml/OrcaSong.git>