diff --git a/src/ca/cac.h b/src/ca/cac.h
index c4cf59a85..e56045d30 100644
--- a/src/ca/cac.h
+++ b/src/ca/cac.h
@@ -144,8 +144,6 @@ public:
         epicsGuard < epicsMutex > &, const cacChannel::ioid & );
 
     // IO requests
-    void writeRequest ( epicsGuard < epicsMutex > &, nciu &, unsigned type, 
-        arrayElementCount nElem, const void * pValue );
     netWriteNotifyIO & writeNotifyRequest ( 
         epicsGuard < epicsMutex > &, nciu &, privateInterfaceForIO &,
         unsigned type, arrayElementCount nElem, const void * pValue,