diff --git a/src/omero/gateway/__init__.py b/src/omero/gateway/__init__.py
index 31a03b5e7..176800d55 100644
--- a/src/omero/gateway/__init__.py
+++ b/src/omero/gateway/__init__.py
@@ -1955,7 +1955,7 @@ def close(self, hard=True):  # pragma: no cover
                 oldC = None
                 self.c = None
                 self._session = None
-                #self._sessionUuid = None
+                self._sessionUuid = None
 
         self._proxies = NoProxies()
         logger.info("closed connection (uuid=%s)" % str(self._sessionUuid))