diff --git a/baselines/ppo2/model.py b/baselines/ppo2/model.py
index f4e5bb8..6b48d97 100644
--- a/baselines/ppo2/model.py
+++ b/baselines/ppo2/model.py
@@ -4,7 +4,6 @@ import functools
 from baselines.common.tf_util import get_session, save_variables, load_variables
 from baselines.common.tf_util import initialize
 
-from mpi4py import MPI
 try:
     from baselines.common.mpi_adam_optimizer import MpiAdamOptimizer
     from mpi4py import MPI