diff --git a/examples/ssd/train_multi.py b/examples/ssd/train_multi.py
index 61f51d9ec5..127081a01d 100644
--- a/examples/ssd/train_multi.py
+++ b/examples/ssd/train_multi.py
@@ -84,7 +84,7 @@ def main():
             pretrained_model='imagenet')
 
     model.use_preset('evaluate')
-    train_chain = MultiboxTrainChain(model)
+    train_chain = MultiboxTrainChain(model, comm=comm)
     chainer.cuda.get_device_from_id(device).use()
     model.to_gpu()