diff --git a/docs/features/autoupdater.rst b/docs/features/autoupdater.rst
index 7b12b4b7..84ed6b08 100644
--- a/docs/features/autoupdater.rst
+++ b/docs/features/autoupdater.rst
@@ -22,6 +22,11 @@ for updates hourly (at a random minute of the hour), but usually only updates du
 
 ``GLUON_PRIORITY`` may be an integer or a decimal fraction.
 
+If ``GLUON_RELEASE`` is used to override the release-string during ``make``
+the same value has to be passed to ``make manifest``. 
+Otherwise no checksums will be included in the manifest.
+
+
 Automated nightly builds
 ------------------------
 
diff --git a/docs/user/getting_started.rst b/docs/user/getting_started.rst
index 9c73c50f..feba9e41 100644
--- a/docs/user/getting_started.rst
+++ b/docs/user/getting_started.rst
@@ -185,6 +185,8 @@ GLUON_RELEASE
   Firmware release number: This string is displayed in the config mode, announced
   via respondd/alfred and used by the autoupdater to decide if a newer version
   is available.
+  The same GLUON_RELEASE has to be passed to ``make`` and ``make manifest`` to
+  generate a manifest for the given images.  
 
 GLUON_TARGET
   Target architecture to build.