diff --git a/src/svc/hasp_mqtt.cpp b/src/svc/hasp_mqtt.cpp
index b7357181..232e21bb 100644
--- a/src/svc/hasp_mqtt.cpp
+++ b/src/svc/hasp_mqtt.cpp
@@ -140,7 +140,7 @@ void mqtt_send_lwt(bool online)
 
 void mqtt_send_object_state(uint8_t pageid, uint8_t btnid, char * payload)
 {
-    char tmp_topic[strlen(mqttNodeTopic) + 12];
+    char tmp_topic[strlen(mqttNodeTopic) + 16];
     snprintf_P(tmp_topic, sizeof(tmp_topic), PSTR("%sstate/p%ub%u"), mqttNodeTopic, pageid, btnid);
     bool res = mqttPublish(tmp_topic, payload);
 }