diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 38a26e02f..5e57a37a8 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+2004-01-16  Christopher Faylor  <cgf@redhat.com>
+
+	* libc/stdio/vfprintf.c: Add sys/lock.h include.
+
 2004-01-16  Thomas Pfaff  <tpfaff@gmx.net>
 
 	* libc/stdio/findfp.c (__sfp): Remove unnecessary memset.
diff --git a/newlib/libc/stdio/vfprintf.c b/newlib/libc/stdio/vfprintf.c
index 5fe443138..96fa4ba2e 100644
--- a/newlib/libc/stdio/vfprintf.c
+++ b/newlib/libc/stdio/vfprintf.c
@@ -187,6 +187,7 @@ static char *rcsid = "$Id$";
 #include <reent.h>
 #include <wchar.h>
 #include <string.h>
+#include <sys/lock.h>
 
 #ifdef _HAVE_STDC
 #include <stdarg.h>