diff --git a/extras/paho_mqtt_c/MQTTESP8266.c b/extras/paho_mqtt_c/MQTTESP8266.c
index cebf24a..a6f1e75 100644
--- a/extras/paho_mqtt_c/MQTTESP8266.c
+++ b/extras/paho_mqtt_c/MQTTESP8266.c
@@ -32,7 +32,7 @@ char  mqtt_timer_expired(mqtt_timer_t* timer)
 {
     TickType_t now = xTaskGetTickCount();
     int32_t left = timer->end_time - now;
-    return (left < 0);
+    return (left <= 0);
 }