diff --git a/server/core/session.c b/server/core/session.c
index dee27e9f4..2ffc777af 100644
--- a/server/core/session.c
+++ b/server/core/session.c
@@ -96,6 +96,10 @@ session_alloc(SERVICE *service, DCB *client_dcb)
         session->ses_chk_top = CHK_NUM_SESSION;
         session->ses_chk_tail = CHK_NUM_SESSION;
 #endif
+	if (DCB_IS_CLONE(client_dcb))
+	{
+		session->ses_is_child = true;
+	}
         spinlock_init(&session->ses_lock);
         /*<
          * Prevent backend threads from accessing before session is completely
diff --git a/server/modules/filter/tee.c b/server/modules/filter/tee.c
index f4ee04685..e11f0eb55 100644
--- a/server/modules/filter/tee.c
+++ b/server/modules/filter/tee.c
@@ -412,8 +412,7 @@ char		*remote, *userName;
 				
 				goto retblock;
 			}
-
-			ses->ses_is_child = true;
+			ss_dassert(ses->ses_is_child);
 			my_session->branch_session = ses;
 			my_session->branch_dcb = dcb;
 		}