diff --git a/libc/kernel/tools/clean_header.py b/libc/kernel/tools/clean_header.py
index f15fab4..07766d3 100755
--- a/libc/kernel/tools/clean_header.py
+++ b/libc/kernel/tools/clean_header.py
@@ -69,7 +69,7 @@
 #   Is prepended to each generated header.
 #------------------------------------------------------------------------------
 
-import sys, cpp, kernel, glob, os, re, getopt
+import sys, cpp, kernel, glob, os, re, getopt, textwrap
 from defaults import *
 from utils import *
 
@@ -116,7 +116,14 @@
     blocks.replaceTokens(kernel_token_replacements)
 
     out = StringOutput()
-    out.write(kernel_disclaimer)
+    out.write(textwrap.dedent("""\
+        /*
+         * This file is auto-generated. Modifications will be lost.
+         *
+         * See https://android.googlesource.com/platform/bionic/+/master/libc/kernel/
+         * for more information.
+         */
+        """))
     blocks.write(out)
     return out.get()