lib/ably/models/protocol_message.rb in ably-1.2.6 vs lib/ably/models/protocol_message.rb in ably-1.2.7

@@ -247,10 +247,9 @@
     end
 
     # Return a JSON ready object from the underlying #attributes using Ably naming conventions for keys
     def as_json(*args)
       raise TypeError, ':action is missing, cannot generate a valid Hash for ProtocolMessage' unless action
-      raise TypeError, ':msg_serial is missing, cannot generate a valid Hash for ProtocolMessage' if ack_required? && !has_message_serial?
 
       attributes.dup.tap do |hash_object|
         hash_object['action']   = action.to_i
         hash_object['messages'] = messages.map(&:as_json) unless messages.empty?
         hash_object['presence'] = presence.map(&:as_json) unless presence.empty?