diff --git a/examples/pybullet/gym/pybullet_envs/__init__.py b/examples/pybullet/gym/pybullet_envs/__init__.py
index a605dafc4..361d8bf42 100644
--- a/examples/pybullet/gym/pybullet_envs/__init__.py
+++ b/examples/pybullet/gym/pybullet_envs/__init__.py
@@ -1,4 +1,10 @@
-from gym.envs.registration import registry, register, make, spec
+import gym
+from gym.envs.registration import registry, make, spec
+def register(id,*args,**kvargs):
+	if id in  registry.env_specs:
+		return
+	else:
+		return gym.envs.registration.register(id,*args,**kvargs)
 
 # ------------bullet-------------