diff --git a/cpukit/ChangeLog b/cpukit/ChangeLog
index 870466eea5..c12a33b446 100644
--- a/cpukit/ChangeLog
+++ b/cpukit/ChangeLog
@@ -1,3 +1,8 @@
+2009-12-10	Ralf Corsépius <ralf.corsepius@rtems.org>
+
+	* libcsupport/include/rtems/libio.h: Change termios-write to ssize_t
+	write(...., size_t).
+
 2009-12-10	Ralf Corsépius <ralf.corsepius@rtems.org>
 
 	* posix/Makefile.am: Unconditionally build src/sigprocmask.c.
diff --git a/cpukit/libcsupport/include/rtems/libio.h b/cpukit/libcsupport/include/rtems/libio.h
index e89427fa2e..0ee6ee8458 100644
--- a/cpukit/libcsupport/include/rtems/libio.h
+++ b/cpukit/libcsupport/include/rtems/libio.h
@@ -566,7 +566,7 @@ typedef struct rtems_termios_callbacks {
   int    (*firstOpen)(int major, int minor, void *arg);
   int    (*lastClose)(int major, int minor, void *arg);
   int    (*pollRead)(int minor);
-  int    (*write)(int minor, const char *buf, int len);
+  ssize_t (*write)(int minor, const char *buf, size_t len);
   int    (*setAttributes)(int minor, const struct termios *t);
   int    (*stopRemoteTx)(int minor);
   int    (*startRemoteTx)(int minor);