diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index a6dc8b607..5978810b4 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+2003-07-25  Christopher Faylor  <cgf@redhat.com>
+
+	* libc/stdio64/fdopen64.c: Include sys/lock.h.
+
 2003-07-25  Christopher Faylor  <cgf@redhat.com>
 
 	* configure.host: Find cygwin include directory, when appropriate.
diff --git a/newlib/libc/stdio64/fdopen64.c b/newlib/libc/stdio64/fdopen64.c
index 96c76411f..d0fd0d584 100644
--- a/newlib/libc/stdio64/fdopen64.c
+++ b/newlib/libc/stdio64/fdopen64.c
@@ -30,6 +30,7 @@ File pointer or <<NULL>>, as for <<fopen>>.
 #include <errno.h>
 #include "local64.h"
 #include <_syslist.h>
+#include <sys/lock.h>
 
 extern int __sflags ();