diff --git a/firmware/config_user.h.example b/firmware/config_user.h.example
index 22b5d00..a4977d4 100644
--- a/firmware/config_user.h.example
+++ b/firmware/config_user.h.example
@@ -1,5 +1,9 @@
 // Copy this file to config_user.h and adjust it to your needs.
 
+
+#ifndef __CONFIG_USER_H__
+#define __CONFIG_USER_H__
+
 // Debug output on the serial console
 #define DEBUG
 
@@ -16,3 +20,6 @@ const char     *INFLUXDB_PASS = "password";
 
 // Device name
 String          DEVICE_NAME   = "devicename";
+
+#endif
+