diff --git a/version-script.in b/version-script.in
index 2bd8ff4253..d79a8e99a9 100644
--- a/version-script.in
+++ b/version-script.in
@@ -14,3 +14,8 @@
 #   };
 
 
+# symbols available since the beginning of this branch are left unversioned
+# (don't remove this!):
+
+@WX_VERSION_TAG@ {
+};