diff --git a/contrib/include/wx/gizmos/splittree.h b/contrib/include/wx/gizmos/splittree.h
index 45eec69af9..6819216d0e 100644
--- a/contrib/include/wx/gizmos/splittree.h
+++ b/contrib/include/wx/gizmos/splittree.h
@@ -80,6 +80,7 @@ public:
     // In case we're using the generic tree control.
     virtual int GetScrollPos(int orient) const;
 
+#if wxABI_VERSION >= 20808
     // Override to suppress vertical scrollbar
     virtual void SetScrollbar(int orient,
                                int pos,
@@ -89,6 +90,8 @@ public:
 
     // Override to get scroll values from companion window
     virtual void DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const;
+#endif
+
 //// Helpers
     void HideVScrollbar();
 
diff --git a/version-script.in b/version-script.in
index 533a792ab3..f9a3e04a19 100644
--- a/version-script.in
+++ b/version-script.in
@@ -28,6 +28,8 @@
 @WX_VERSION_TAG@.8 {
     global:
         *TimeZone*Make*;
+        *wxRemotelyScrolledTreeCtrl*DoCalcScrolledPosition*;
+        *wxRemotelyScrolledTreeCtrl*SetScrollbar*;
         *wxScrollHelper*HandleOnChildFocus*;
         *wxWindowBase*Get*Sibling*;
 };