diff --git a/simgear/props/AtomicChangeListener.cxx b/simgear/props/AtomicChangeListener.cxx
index c2e08ac7..e0617d7b 100644
--- a/simgear/props/AtomicChangeListener.cxx
+++ b/simgear/props/AtomicChangeListener.cxx
@@ -16,7 +16,7 @@ MultiChangeListener::MultiChangeListener()
 {
 }
 
-void MultiChangeListener::valueChanged()
+void MultiChangeListener::valueChanged(SGPropertyNode* node)
 {
     valueChangedImplementation();
 }
diff --git a/simgear/props/AtomicChangeListener.hxx b/simgear/props/AtomicChangeListener.hxx
index a5ad7f6b..a287738c 100644
--- a/simgear/props/AtomicChangeListener.hxx
+++ b/simgear/props/AtomicChangeListener.hxx
@@ -15,7 +15,7 @@
 namespace simgear
 {
 // Performs an action when one of several nodes changes
-class MultiChangeListener : private SGPropertyChangeListener
+class MultiChangeListener : public SGPropertyChangeListener
 {
 public:
     MultiChangeListener();
@@ -25,9 +25,8 @@ public:
         for (Pitr itr = propsBegin, end = propsEnd; itr != end; ++itr)
             (*itr)->addChangeListener(this);
     }
-    void valueChanged();
-    using SGPropertyChangeListener::unregister_property;
 private:
+    void valueChanged(SGPropertyNode* node);
     virtual void valueChangedImplementation();
 
 };