diff --git a/src/ca/autoPtrDestroy.h b/src/ca/autoPtrDestroy.h
index 5261c9d10..a59cf7939 100644
--- a/src/ca/autoPtrDestroy.h
+++ b/src/ca/autoPtrDestroy.h
@@ -39,6 +39,9 @@ public:
     T * release ();
 private:
     T *p;
+    // not implemented
+    autoPtrDestroy<T> & operator = ( const autoPtrDestroy<T> & );
+    autoPtrDestroy ( const autoPtrDestroy<T> & );
 };
 
 template < class T >
diff --git a/src/ca/autoPtrFreeList.h b/src/ca/autoPtrFreeList.h
index 9a392d705..23d62a5d8 100644
--- a/src/ca/autoPtrFreeList.h
+++ b/src/ca/autoPtrFreeList.h
@@ -51,6 +51,9 @@ public:
 private:
     T * p;
     tsFreeList < T > & freeList;
+    // not implemented
+    autoPtrFreeList & operator = ( const autoPtrFreeList & );
+    autoPtrFreeList ( const autoPtrFreeList<T> & );
 };
 
 template < class T >
diff --git a/src/ca/autoPtrRecycle.h b/src/ca/autoPtrRecycle.h
index 3e3f0b84a..51d4b7f36 100644
--- a/src/ca/autoPtrRecycle.h
+++ b/src/ca/autoPtrRecycle.h
@@ -42,6 +42,7 @@ private:
     cacRecycle &r;
     tsDLList < class baseNMIU > &eventq;
     chronIntIdResTable < baseNMIU > &ioTable;
+    // not implemented
 	autoPtrRecycle ( const autoPtrRecycle & );
 	autoPtrRecycle & operator = ( const autoPtrRecycle & );
 };