diff --git a/examples/pybullet/gym/pybullet_envs/agents/configs.py b/examples/pybullet/gym/pybullet_envs/agents/configs.py
index 3def13e70..9b2cb2da2 100644
--- a/examples/pybullet/gym/pybullet_envs/agents/configs.py
+++ b/examples/pybullet/gym/pybullet_envs/agents/configs.py
@@ -18,7 +18,7 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
-# pylint: disable=unused-variable
+import functools
 
 from agents import ppo
 from agents.scripts import networks