diff --git a/version-script.in b/version-script.in
index bb11e1497d..75e4c75212 100644
--- a/version-script.in
+++ b/version-script.in
@@ -27,8 +27,9 @@
 # public symbols added in 2.8.8 (please keep in alphabetical order):
 @WX_VERSION_TAG@.8 {
     global:
-	*wxApp*MacHideApp*;
+        *wxApp*MacHideApp*;
         *TimeZone*Make*;
+        *wxBitmapButton*OnFocusChange*;
         *wxRemotelyScrolledTreeCtrl*DoCalcScrolledPosition*;
         *wxRemotelyScrolledTreeCtrl*SetScrollbar*;
         *wxRichTextCtrl*GetTextCursor*;