diff --git a/src/box/iproto.cc b/src/box/iproto.cc
index c184871f4b49f884c2ff0f39f6d2bba4362f8441..bce1016e6c2c27ffe470ed24f173ca4dcb6edf5a 100644
--- a/src/box/iproto.cc
+++ b/src/box/iproto.cc
@@ -774,7 +774,6 @@ iproto_process_connect(struct iproto_request *request)
 		return;
 	} catch (Exception *e) {
 		e->log();
-		assert(con->session == NULL);
 		iproto_connection_close(con);
 		return;
 	}