diff --git a/src/ca/netiiu.cpp b/src/ca/netiiu.cpp
index 8d6031190..a7fa42e82 100644
--- a/src/ca/netiiu.cpp
+++ b/src/ca/netiiu.cpp
@@ -102,11 +102,6 @@ bool netiiu::ca_v42_ok () const
     return false;
 }
 
-bool netiiu::ca_v41_ok () const
-{
-    return false;
-}
-
 bool netiiu::pushDatagramMsg ( const caHdr &, const void *, ca_uint16_t )
 {
     return false;
@@ -208,3 +203,9 @@ int netiiu::printf ( const char *pformat, ... )
     
     return status;
 }
+
+void netiiu::requestRecvProcessPostponedFlush ()
+{
+    return;
+}
+
diff --git a/src/ca/netiiu.h b/src/ca/netiiu.h
index 778bd85fe..f81411931 100644
--- a/src/ca/netiiu.h
+++ b/src/ca/netiiu.h
@@ -46,7 +46,6 @@ public:
     virtual const char * pHostName () const; // deprecated - please do not use
     virtual bool isVirtaulCircuit ( const char *pChannelName, const osiSockAddr &addr ) const;
     virtual bool ca_v42_ok () const;
-    virtual bool ca_v41_ok () const;
     virtual bool pushDatagramMsg ( const caHdr &hdr, const void *pExt, ca_uint16_t extsize);
     virtual void writeRequest ( nciu &, unsigned type, unsigned nElem, const void *pValue );
     virtual void writeNotifyRequest ( nciu &, netWriteNotifyIO &, unsigned type, unsigned nElem, const void *pValue );
@@ -62,6 +61,7 @@ public:
     virtual bool flushBlockThreshold () const;
     virtual void flushRequestIfAboveEarlyThreshold ();
     virtual void blockUntilSendBacklogIsReasonable ( epicsMutex & );
+    virtual void requestRecvProcessPostponedFlush ();
 protected:
     cac * pCAC () const;
 private: