diff --git a/fbchat/client.py b/fbchat/client.py
index be2505b..83d7a40 100644
--- a/fbchat/client.py
+++ b/fbchat/client.py
@@ -1004,7 +1004,7 @@ class Client(object):
         thread_id, thread_type = self._getThread(thread_id, thread_type)
         data = self._getSendData(thread_id=thread_id, thread_type=thread_type)
         data['action_type'] = 'ma-type:user-generated-message'
-        data['lightweight_action_attachment[lwa_state]'] = "INITIATED" if init else "RECIPROCATED"
+        data['lightweight_action_attachment[lwa_state]'] = "INITIATED" if wave_first else "RECIPROCATED"
         data['lightweight_action_attachment[lwa_type]'] = "WAVE"
         if thread_type == ThreadType.USER:
             data['specific_to_list[0]'] = "fbid:{}".format(thread_id)