diff --git a/components/mqtt/esp-mqtt b/components/mqtt/esp-mqtt
index 6f1fc3785..e3b013e2d 160000
--- a/components/mqtt/esp-mqtt
+++ b/components/mqtt/esp-mqtt
@@ -1 +1 @@
-Subproject commit 6f1fc3785af8cc7765f78dd93f09aeb0109cd2b7
+Subproject commit e3b013e2db58124ea68cf7c8f44a8cba6e1572b7
diff --git a/docs/Doxyfile b/docs/Doxyfile
index 31ea6a480..8be68c7c5 100644
--- a/docs/Doxyfile
+++ b/docs/Doxyfile
@@ -238,7 +238,8 @@ PREDEFINED             = \
     configTHREAD_LOCAL_STORAGE_DELETE_CALLBACKS=1 \
     configNUM_THREAD_LOCAL_STORAGE_POINTERS=1 \
     configUSE_APPLICATION_TASK_TAG=1 \
-    configTASKLIST_INCLUDE_COREID=1
+    configTASKLIST_INCLUDE_COREID=1 \
+    "ESP_EVENT_DECLARE_BASE(x)=extern esp_event_base_t x"
 
 ## Do not complain about not having dot
 ##
diff --git a/examples/protocols/mqtt/ssl/main/app_main.c b/examples/protocols/mqtt/ssl/main/app_main.c
index 86697a03c..3ce00741c 100644
--- a/examples/protocols/mqtt/ssl/main/app_main.c
+++ b/examples/protocols/mqtt/ssl/main/app_main.c
@@ -115,6 +115,9 @@ static esp_err_t mqtt_event_handler(esp_mqtt_event_handle_t event)
             break;
         case MQTT_EVENT_ERROR:
             ESP_LOGI(TAG, "MQTT_EVENT_ERROR");
+            if (event->error_handle->error_type == MQTT_ERROR_TYPE_CONNECTION_REFUSED) {
+                ESP_LOGI(TAG, "Connection refused error: 0x%x", event->error_handle->connect_return_code);
+            }
             break;
         default:
             ESP_LOGI(TAG, "Other event id:%d", event->event_id);