diff --git a/src/ca/syncGroupReadNotify.cpp b/src/ca/syncGroupReadNotify.cpp
index 7984db0f7..9a5be3ebb 100644
--- a/src/ca/syncGroupReadNotify.cpp
+++ b/src/ca/syncGroupReadNotify.cpp
@@ -92,14 +92,14 @@ void syncGroupReadNotify::show ( unsigned level ) const
     }
 }
 
-void * syncGroupReadNotify::operator new ( size_t )
+void * syncGroupReadNotify::operator new ( size_t ) // X aCC 361
 {
     // The HPUX compiler seems to require this even though no code
     // calls it directly
     throw std::logic_error ( "why is the compiler calling private operator new" );
 }
 
-void syncGroupReadNotify::operator delete ( void * p )
+void syncGroupReadNotify::operator delete ( void * )
 {
     // Visual C++ .net appears to require operator delete if
     // placement operator delete is defined? I smell a ms rat
diff --git a/src/ca/syncGroupWriteNotify.cpp b/src/ca/syncGroupWriteNotify.cpp
index 0e8166c34..b3af3bdcb 100644
--- a/src/ca/syncGroupWriteNotify.cpp
+++ b/src/ca/syncGroupWriteNotify.cpp
@@ -86,14 +86,14 @@ void syncGroupWriteNotify::show ( unsigned level ) const
     }
 }
 
-void * syncGroupWriteNotify::operator new ( size_t )
+void * syncGroupWriteNotify::operator new ( size_t ) // X aCC 361
 {
     // The HPUX compiler seems to require this even though no code
     // calls it directly
     throw std::logic_error ( "why is the compiler calling private operator new" );
 }
 
-void syncGroupWriteNotify::operator delete ( void * p )
+void syncGroupWriteNotify::operator delete ( void * )
 {
     // Visual C++ .net appears to require operator delete if
     // placement operator delete is defined? I smell a ms rat