diff --git a/src/doc/README_SETUP.md b/src/doc/README_SETUP.md
index a75193783d861707adf3b3d45311c392e22626f4..32f0bb89a6051bc2ec4be0bae6cf06cd1a540f8b 100644
--- a/src/doc/README_SETUP.md
+++ b/src/doc/README_SETUP.md
@@ -13,7 +13,10 @@ see INSTALL.md
 We use sphinx to create the documentation. Docstrings in the code should comply
 with the Googly style (see link below).
 
-Build documentation in `src/doc` with `make html`.
+Build documentation in `src/doc` with `make doc`. Note that for the
+automatic generation of the complete API documentation, it is
+necessary to first install this library with all its optional
+dependencies, i.e., `pip install .[h5-crawler,spss]`.
 
 ### Requirements ###