diff --git a/src/db/dbPutNotifyBlocker.h b/src/db/dbPutNotifyBlocker.h
new file mode 100644
index 000000000..8509d1302
--- /dev/null
+++ b/src/db/dbPutNotifyBlocker.h
@@ -0,0 +1,56 @@
+
+/*  
+ *  $Id$
+ *
+ *                              
+ *                    L O S  A L A M O S
+ *              Los Alamos National Laboratory
+ *               Los Alamos, New Mexico 87545
+ *                                  
+ *  Copyright, 1986, The Regents of the University of California.
+ *                                  
+ *           
+ *	Author Jeffrey O. Hill
+ *	johill@lanl.gov
+ *	505 665 1831
+ */
+
+#ifndef dbPutNotifyBlockerh
+#define dbPutNotifyBlockerh
+
+class dbPutNotifyBlocker : public dbBaseIO {
+public:
+    dbPutNotifyBlocker ( dbChannelIO & chanIn );
+    void initiatePutNotify ( epicsGuard < epicsMutex > & locker, 
+            cacWriteNotify & notify, struct dbAddr & addr, 
+            unsigned type, unsigned long count, const void * pValue );
+    void cancel ();
+    void show ( unsigned level ) const;
+    void * operator new ( size_t size );
+    void operator delete ( void *pCadaver, size_t size );
+    void destroy ();
+protected:
+    virtual ~dbPutNotifyBlocker ();
+private:
+    putNotify pn;
+    epicsEvent block;
+    cacWriteNotify * pNotify;
+    dbSubscriptionIO * isSubscription ();
+    static epicsSingleton < tsFreeList < dbPutNotifyBlocker > > freeList;
+    friend void putNotifyCompletion ( putNotify *ppn );
+	dbPutNotifyBlocker ( const dbPutNotifyBlocker & );
+	dbPutNotifyBlocker & operator = ( const dbPutNotifyBlocker & );
+};
+
+inline void * dbPutNotifyBlocker::operator new ( size_t size )
+{
+    return dbPutNotifyBlocker::freeList.allocate ( size );
+}
+
+inline void dbPutNotifyBlocker::operator delete ( void *pCadaver, size_t size )
+{
+    dbPutNotifyBlocker::freeList.release ( pCadaver, size );
+}
+
+#endif // ifndef dbPutNotifyBlockerh
+