diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index d4e94e495..a0aa2a83e 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+Sat Aug 25 22:22:25 2001  Christopher Faylor <cgf@cygnus.com>
+
+	* libc/include/sys/errno.h: Add a cautionary comment.
+
 2001-08-21  Jeff Johnston  <jjohnstn@redhat.com>
 
 	* libc/stdlib/mallocr.c [!defined(MALLOC_ALIGNMENT)]: Add conditional
diff --git a/newlib/libc/include/sys/errno.h b/newlib/libc/include/sys/errno.h
index 672d99eac..26b56925e 100644
--- a/newlib/libc/include/sys/errno.h
+++ b/newlib/libc/include/sys/errno.h
@@ -15,6 +15,8 @@ extern "C" {
 extern int *__errno _PARAMS ((void));
 #endif
 
+/* Please don't use these variables directly.
+   Use strerror instead. */
 extern __IMPORT _CONST char * _CONST _sys_errlist[];
 extern __IMPORT int _sys_nerr;
 #ifdef __CYGWIN__