diff --git a/plugins/generateplugininfo.py b/plugins/generateplugininfo.py
index 9e96b0fa..2cf6befe 100755
--- a/plugins/generateplugininfo.py
+++ b/plugins/generateplugininfo.py
@@ -74,6 +74,13 @@ def extractEventTypes(deviceClassMap):
 
 
 # write header
+out("/* This file is generated by the guh build system. Any changes to this fille")
+out(" * be lost.")
+out("")
+out(" * If you want to change this file, edit the plugin's json file and add")
+out(" * idName tags where appropriate.")
+out(" */")
+
 out("#ifndef PLUGININFO_H")
 out("#define PLUGININFO_H")
 out("#include \"typeutils.h\"");