diff --git a/sane/sane.def b/sane/sane.def
index 13abb0a..8f9d0a0 100644
--- a/sane/sane.def
+++ b/sane/sane.def
@@ -5,6 +5,7 @@ EXPORTS
     is_scanner_online
     uninitialize
     log_info
+    sane_ex_get_driver_version
     sane_hgsane_init
     sane_hgsane_exit
     sane_hgsane_get_devices