diff --git a/src/ca/tcpiiu_IL.h b/src/ca/tcpiiu_IL.h
index 5378345a5..bfe41563c 100644
--- a/src/ca/tcpiiu_IL.h
+++ b/src/ca/tcpiiu_IL.h
@@ -23,7 +23,7 @@ inline bool tcpiiu::fullyConstructed () const
 
 inline void tcpiiu::hostName ( char *pBuf, unsigned bufLength ) const
 {   
-    epicsAutoMutex autoMutex ( this->mutex );
+    epicsAutoMutex locker ( this->mutex );
     if ( this->pHostNameCache ) {
         this->pHostNameCache->hostName ( pBuf, bufLength );
     }
@@ -32,7 +32,7 @@ inline void tcpiiu::hostName ( char *pBuf, unsigned bufLength ) const
     }
 }
 
-// deprecated - please dont use
+// deprecated - please dont use - this is _not_ thread safe
 inline const char * tcpiiu::pHostName () const
 {
     static char nameBuf [128];
@@ -50,11 +50,6 @@ inline bool tcpiiu::ca_v44_ok () const
     return CA_V44 ( CA_PROTOCOL_VERSION, this->minorProtocolVersion );
 }
 
-inline bool tcpiiu::ca_v42_ok () const
-{
-    return CA_V42 ( CA_PROTOCOL_VERSION, this->minorProtocolVersion );
-}
-
 inline bool tcpiiu::ca_v41_ok () const
 {
     return CA_V41 ( CA_PROTOCOL_VERSION, this->minorProtocolVersion );