diff --git a/conf/core/server.conf b/conf/core/server.conf
index 8922d19c8a41a0d54de3357e4ac3eecffdcbf482..c9151888e785b8114f104fdcd14c43714fc80b37 100644
--- a/conf/core/server.conf
+++ b/conf/core/server.conf
@@ -75,7 +75,7 @@ MYSQL_SCHEMA_VERSION=v4.0.0
 # Server options
 # --------------------------------------------------
 # The context root is a prefix which allows running multiple instances of CaosDB using the same
-# hostname and port.
+# hostname and port. Must start with "/".
 CONTEXT_ROOT=
 # HTTPS port of this server instance.
 SERVER_PORT_HTTPS=443