diff --git a/docs/sysadm/data-silos/cassandra/installation.rst b/docs/sysadm/data-silos/cassandra/installation.rst
index ccef8c2d57e5e84c7f553b72fa896d2c2cc5084a..edd28a5cc565297d4a04da6232125bb00412e16f 100644
--- a/docs/sysadm/data-silos/cassandra/installation.rst
+++ b/docs/sysadm/data-silos/cassandra/installation.rst
@@ -146,6 +146,7 @@ Connect to cqlsh with the new `admin` user:
   GRANT CREATE ON ALL KEYSPACES to 'reaper';
   GRANT SELECT ON KEYSPACE reaper_db to 'reaper';
   GRANT MODIFY ON KEYSPACE reaper_db to 'reaper';
+  GRANT ALTER ON KEYSPACE reaper_db to 'reaper';
 
 8. Specific table configurations