diff --git a/developer_manual/android_library/index.rst b/developer_manual/android_library/index.rst
index 386c26015..7342fa775 100644
--- a/developer_manual/android_library/index.rst
+++ b/developer_manual/android_library/index.rst
@@ -21,6 +21,8 @@ setup and process of contribution is
 You might want to start with doing one or two `junior jobs <https://github.com/owncloud/android/issues?q=is%3Aopen+is%3Aissue+label%3A%22Junior+Job%22>`_
 to get into the code and note our :doc:`../general/index`
 
+Note that contribution to the Android client require signing the `ownCloud Contributor Agreement <https://owncloud.org/contribute/agreement/>`_.
+
 ownCloud Android Library
 ------------------------