diff --git a/docs/userguide.rst b/docs/userguide.rst
index eef6b43e80d58f4da42e5013665dc890096b2e33..3b506a771511c7c6aac112acd4dc3d023247d354 100644
--- a/docs/userguide.rst
+++ b/docs/userguide.rst
@@ -55,7 +55,7 @@ You can download the source code from Pasteur's **Gitlab**: https://gitlab.paste
 
 In order to directly run **RPG** from source, you need to copy file ``tests/context.py`` into ``rpg`` folder.
 
-Then, uncomment line 42 of ``rpg/RapidePeptideGenerator.py``. Modify:
+Then, uncomment line 42 of ``rpg/RapidPeptidesGenerator.py``. Modify:
 
 .. code-block:: python