diff --git a/etc/mkloader.pl b/etc/mkloader.pl
index ff60c784..1702414c 100755
--- a/etc/mkloader.pl
+++ b/etc/mkloader.pl
@@ -3,6 +3,13 @@
 use strict;
 
 print <<EOL;
+/**
+ *                                !!NOTICE!!
+ * This file was automatically generated by mkloader.pl, and includes all of
+ * the prelude files required by Picrin. PLEASE DO NOT EDIT THIS FILE, changes
+ * will be overwritten the next time the script runs.
+ */
+
 #include "picrin.h"
 #include "picrin/error.h"