diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index b5e314ad3..d172fa074 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,7 @@
+2005-05-28  Christopher Faylor  <cgf@timesys.com>
+
+	* fhandler_tty.cc (fhandler_tty_slave:tcflush): Use signed comparison.
+
 2005-05-28  Christopher Faylor  <cgf@timesys.com>
 
 	* times.cc (time_ms::usecs): Coerce comparison to signed or whole test
diff --git a/winsup/cygwin/fhandler_tty.cc b/winsup/cygwin/fhandler_tty.cc
index d74ddbc59..a31fe6244 100644
--- a/winsup/cygwin/fhandler_tty.cc
+++ b/winsup/cygwin/fhandler_tty.cc
@@ -1048,7 +1048,7 @@ fhandler_tty_slave::tcflush (int queue)
     {
       size_t len = UINT_MAX;
       read (NULL, len);
-      ret = len >= 0;
+      ret = ((int) len) >= 0;
     }
   if (queue == TCOFLUSH || queue == TCIOFLUSH)
     {