diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 6111d7f82..a010a3ab3 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2005-12-12  Christopher Faylor  <cgf@timesys.com>
+
+	* times.cc (hires_ms::usecs): Subtract from slop from system time or
+	we'll always end up priming the pump.
+
 2005-12-12  Nick Duffek <nick@duffek.com>
 
 	* times.cc (systime): Correct precision referenced in comment.
diff --git a/winsup/cygwin/times.cc b/winsup/cygwin/times.cc
index 482045449..ba387bfd6 100644
--- a/winsup/cygwin/times.cc
+++ b/winsup/cygwin/times.cc
@@ -644,7 +644,7 @@ hires_ms::usecs ()
 
   LONGLONG t = systime ();
   LONGLONG res = initime_us + (((LONGLONG) timeGetTime ()) * 1000LL);
-  if (res < t)
+  if (res < (t - 40000LL))
     {
       inited = false;
       prime ();