diff --git a/README.rst b/README.rst
index 58cdbb8b219385a223a669ba1669bba10be4b17e..fc16664d658805bf5c1eadc9a40d3e7d9517fb2e 100644
--- a/README.rst
+++ b/README.rst
@@ -82,7 +82,8 @@ run server
 .. code-block:: shell
 
     > cd /path/to/cal
-    > ./server
+    > ./server 
+    > # env -u CAL_USR ./server # if env variable CAL_USR exist but CouchDB (2.3.1) has no such user
 
 install daemon and start 
 ========================