diff --git a/src/cas/generic/casDGClient.cc b/src/cas/generic/casDGClient.cc
index ca32994c9..448c65bb9 100644
--- a/src/cas/generic/casDGClient.cc
+++ b/src/cas/generic/casDGClient.cc
@@ -318,7 +318,7 @@ caStatus casDGClient::versionAction ()
 	const caHdrLargeArray * mp = this->ctx.getMsg();
 
     if ( mp->m_count != 0 ) {
-        this->minor_version_number = mp->m_count;
+        this->minor_version_number = static_cast <ca_uint16_t> ( mp->m_count );
         if ( CA_V411 ( mp->m_count ) ) {
             this->seqNoOfReq = mp->m_cid;
         }
diff --git a/src/cas/generic/server.h b/src/cas/generic/server.h
index 3304fec82..68fcdfc19 100644
--- a/src/cas/generic/server.h
+++ b/src/cas/generic/server.h
@@ -248,7 +248,7 @@ private:
 
 extern epicsSingleton < casBufferFactory > pGlobalBufferFactoryCAS;
 
-class inBufClient {
+class inBufClient {             // X aCC 655
 public:
     enum fillCondition { casFillNone,  casFillProgress,  
         casFillDisconnect };
@@ -339,7 +339,7 @@ private:
 	bufSizeT stack;
 };
 
-class outBufClient {
+class outBufClient {            // X aCC 655
 public:
     enum flushCondition { flushNone, flushProgress, flushDisconnect };
 	virtual unsigned getDebugLevel () const = 0;
diff --git a/src/cas/io/bsdSocket/ipIgnoreEntry.cpp b/src/cas/io/bsdSocket/ipIgnoreEntry.cpp
index 0f4358dc2..e6c0f826a 100644
--- a/src/cas/io/bsdSocket/ipIgnoreEntry.cpp
+++ b/src/cas/io/bsdSocket/ipIgnoreEntry.cpp
@@ -22,7 +22,7 @@
 
 epicsSingleton < tsFreeList < ipIgnoreEntry, 1024 > > ipIgnoreEntry::pFreeList;
 
-void ipIgnoreEntry::show ( unsigned level ) const
+void ipIgnoreEntry::show ( unsigned /* level */ ) const
 {
     char buf[256];
     struct sockaddr_in addr;