diff --git a/src/libCom/osi/os/cygwin32/systemCallIntMech.cpp b/src/libCom/osi/os/cygwin32/systemCallIntMech.cpp
new file mode 100644
index 000000000..e5cf916e4
--- /dev/null
+++ b/src/libCom/osi/os/cygwin32/systemCallIntMech.cpp
@@ -0,0 +1,28 @@
+
+/*************************************************************************\
+* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
+*     National Laboratory.
+* Copyright (c) 2002 The Regents of the University of California, as
+*     Operator of Los Alamos National Laboratory.
+* EPICS BASE Versions 3.13.7
+* and higher are distributed subject to a Software License Agreement found
+* in file LICENSE that is included with this distribution. 
+\*************************************************************************/
+/* $Revision-Id$ */
+/*
+ *      Author:		Jeff Hill 
+ */
+
+#define epicsExportSharedSymbols
+#include "osiSock.h"
+
+enum epicsSocketSystemCallInterruptMechanismQueryInfo 
+        epicsSocketSystemCallInterruptMechanismQuery ()
+{
+#if (CYGWIN_VERSION_DLL_MAJOR >= 1007)
+    // Behaviour changed in Cygwin 1.7 release.
+    return esscimqi_socketCloseRequired;
+#else
+    return esscimqi_socketBothShutdownRequired;
+#endif
+}