diff --git a/apps/iot/include/emqtt.hrl b/apps/iot/include/emqtt.hrl
index 8caa08f..48cc014 100644
--- a/apps/iot/include/emqtt.hrl
+++ b/apps/iot/include/emqtt.hrl
@@ -405,12 +405,6 @@
             reason_code = ReasonCode}
     }).
 
--define(PUBREC_PACKET(PacketId, ReasonCode),
-        #mqtt_packet{header   = #mqtt_packet_header{type = ?PUBREC},
-                     variable = #mqtt_packet_puback{packet_id   = PacketId,
-                                                    reason_code = ReasonCode}
-                    }).
-
 -define(PUBREC_PACKET(PacketId, ReasonCode, Properties),
     #mqtt_packet{header   = #mqtt_packet_header{type = ?PUBREC},
                  variable = #mqtt_packet_puback{packet_id   = PacketId,