diff --git a/MQTTSNClient/src/MQTTSNClient.h b/MQTTSNClient/src/MQTTSNClient.h
index 674d2f4..cc3385d 100644
--- a/MQTTSNClient/src/MQTTSNClient.h
+++ b/MQTTSNClient/src/MQTTSNClient.h
@@ -390,7 +390,7 @@ int MQTTSN::Client<Network, Timer, MAX_PACKET_SIZE, b>::readPacket(Timer& timer)
     int lenlen = 0;
     int datalen = 0;
 
-    #define MQTTSN_MIN_PACKET_LENGTH 3
+    #define MQTTSN_MIN_PACKET_LENGTH 2
     // 1. read the packet, datagram style 
     if ((len = ipstack.read(readbuf, MAX_PACKET_SIZE, timer.left_ms())) < MQTTSN_MIN_PACKET_LENGTH)
         goto exit;
diff --git a/MQTTSNPacket/src/MQTTSNPacket.c b/MQTTSNPacket/src/MQTTSNPacket.c
index b367332..e6e8d8f 100644
--- a/MQTTSNPacket/src/MQTTSNPacket.c
+++ b/MQTTSNPacket/src/MQTTSNPacket.c
@@ -248,7 +248,7 @@ int MQTTSNstrlen(MQTTSNString MQTTSNString)
 int MQTTSNPacket_read(unsigned char* buf, int buflen, int (*getfn)(unsigned char*, int))
 {
 	int rc = MQTTSNPACKET_READ_ERROR;
-	const int MQTTSN_MIN_PACKET_LENGTH = 3;
+	const int MQTTSN_MIN_PACKET_LENGTH = 2;
 	int len = 0;  /* the length of the whole packet including length field */
 	int lenlen = 0;
 	int datalen = 0;