diff --git a/keywords.txt b/keywords.txt
index 79039777..f2fb5fc3 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -116,5 +116,10 @@ ERR_MQTT_CONN_ID_REJECTED	LITERAL1
 ERR_MQTT_CONN_SERVER_UNAVAILABLE	LITERAL1
 ERR_MQTT_CONN_BAD_USERNAME_PASSWORD	LITERAL1
 ERR_MQTT_CONN_NOT_AUTHORIZED	LITERAL1
+ERR_MQTT_UNEXPECTED_PACKET_ID	LITERAL1
+MQTT_SUBS_SUCCESS_QOS_0	LITERAL1
+MQTT_SUBS_SUCCESS_QOS_1	LITERAL1
+MQTT_SUBS_SUCCESS_QOS_2	LITERAL1
+ERR_MQTT_SUBS_FAILED	LITERAL1
 
 ERR_CMD_MODE_FAILED	LITERAL1
diff --git a/src/TypeDef.h b/src/TypeDef.h
index 1427cf55..3ae1ae2c 100644
--- a/src/TypeDef.h
+++ b/src/TypeDef.h
@@ -82,6 +82,11 @@
 #define ERR_MQTT_CONN_SERVER_UNAVAILABLE      0x07
 #define ERR_MQTT_CONN_BAD_USERNAME_PASSWORD   0x08
 #define ERR_MQTT_CONN_NOT_AUTHORIZED          0x09
+#define ERR_MQTT_UNEXPECTED_PACKET_ID         0x0A
+#define MQTT_SUBS_SUCCESS_QOS_0               0x00
+#define MQTT_SUBS_SUCCESS_QOS_1               0x01
+#define MQTT_SUBS_SUCCESS_QOS_2               0x02
+#define ERR_MQTT_SUBS_FAILED                  0x80
 
 // XBee status codes
 #define ERR_CMD_MODE_FAILED                   0x02