diff --git a/lib/libpthread/README b/lib/libpthread/README
new file mode 100644
index 000000000000..72a1b2fe60db
--- /dev/null
+++ b/lib/libpthread/README
@@ -0,0 +1,4 @@
+$NetBSD: README,v 1.5 2007/10/16 15:21:54 ad Exp $
+
+When making changes to libpthread, please ensure that libpthread_dbg
+still compiles.
diff --git a/lib/libpthread/pthread_int.h b/lib/libpthread/pthread_int.h
index c2f16e17abee..98076c5a42ba 100644
--- a/lib/libpthread/pthread_int.h
+++ b/lib/libpthread/pthread_int.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: pthread_int.h,v 1.58 2007/10/16 15:07:02 ad Exp $	*/
+/*	$NetBSD: pthread_int.h,v 1.59 2007/10/16 15:21:54 ad Exp $	*/
 
 /*-
  * Copyright (c) 2001, 2002, 2003, 2006, 2007 The NetBSD Foundation, Inc.
@@ -36,6 +36,11 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+/*
+ * NOTE: when changing anything in this file, please ensure that
+ * libpthread_dbg still compiles.
+ */
+
 #ifndef _LIB_PTHREAD_INT_H
 #define _LIB_PTHREAD_INT_H