diff --git a/tianshou/data/collector.py b/tianshou/data/collector.py
index b57e6f0..88f6c76 100644
--- a/tianshou/data/collector.py
+++ b/tianshou/data/collector.py
@@ -347,6 +347,7 @@ class Collector(object):
                         info=self.data.info,
                         policy=self.data.policy,
                         env_id=ready_env_ids,
+                        act=self.data.act,
                     )
                 )
 
@@ -626,6 +627,7 @@ class AsyncCollector(Collector):
                             truncated=self.data.truncated,
                             info=self.data.info,
                             env_id=ready_env_ids,
+                            act=self.data.act,
                         )
                     )
                 except TypeError:
@@ -636,6 +638,7 @@ class AsyncCollector(Collector):
                             done=self.data.done,
                             info=self.data.info,
                             env_id=ready_env_ids,
+                            act=self.data.act,
                         )
                     )