diff --git a/lib/include/mqtt_config.h b/lib/include/mqtt_config.h
index 500db52..e4b5ce5 100644
--- a/lib/include/mqtt_config.h
+++ b/lib/include/mqtt_config.h
@@ -99,7 +99,7 @@
 #ifdef CONFIG_MQTT_EVENT_QUEUE_SIZE
 #define MQTT_EVENT_QUEUE_SIZE       CONFIG_MQTT_EVENT_QUEUE_SIZE
 #else
-#define MQTT_EVENT_QUEUE_SIZE       10
+#define MQTT_EVENT_QUEUE_SIZE       1
 #endif
 
 #define OUTBOX_MAX_SIZE             (4*1024)