diff --git a/lib/include/mqtt_config.h b/lib/include/mqtt_config.h
index 9921085..25685d6 100644
--- a/lib/include/mqtt_config.h
+++ b/lib/include/mqtt_config.h
@@ -60,7 +60,7 @@
 #define MQTT_WS_DEFAULT_PORT        80
 #endif
 
-#ifdef MQTT_WSS_DEFAULT_PORT
+#ifdef CONFIG_MQTT_WSS_DEFAULT_PORT
 #define MQTT_WSS_DEFAULT_PORT       CONFIG_MQTT_WSS_DEFAULT_PORT
 #else
 #define MQTT_WSS_DEFAULT_PORT       443