diff --git a/baselines/acer/acer_simple.py b/baselines/acer/acer_simple.py
index 0ca4fb9..5690294 100644
--- a/baselines/acer/acer_simple.py
+++ b/baselines/acer/acer_simple.py
@@ -198,7 +198,7 @@ class Model(object):
 
         def save(save_path):
             ps = sess.run(params)
-            make_path(save_path)
+            make_path(osp.dirname(save_path))
             joblib.dump(ps, save_path)
 
         self.train = train