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-rw-r--r--winsup/cygwin/select.cc4
1 files changed, 4 insertions, 0 deletions
diff --git a/winsup/cygwin/select.cc b/winsup/cygwin/select.cc
index eceeeafcb..da54da5a1 100644
--- a/winsup/cygwin/select.cc
+++ b/winsup/cygwin/select.cc
@@ -928,6 +928,10 @@ peek_serial (select_record *s, bool)
goto out;
}
+ /* This is apparently necessary for the com0com driver.
+ See: http://cygwin.com/ml/cygwin/2009-01/msg00667.html */
+ SetCommMask (h, 0);
+
SetCommMask (h, EV_RXCHAR);
if (!fh->overlapped_armed)