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-rw-r--r--src/widgets/newgrf_widget.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/widgets/newgrf_widget.h b/src/widgets/newgrf_widget.h
index c0c00ed8b..271b6669a 100644
--- a/src/widgets/newgrf_widget.h
+++ b/src/widgets/newgrf_widget.h
@@ -39,6 +39,7 @@ enum NewGRFStateWidgets {
WID_NS_REMOVE, ///< Remove NewGRF from active list.
WID_NS_MOVE_UP, ///< Move NewGRF up in active list.
WID_NS_MOVE_DOWN, ///< Move NewGRF down in active list.
+ WID_NS_UPGRADE, ///< Upgrade NewGRFs that have a newer version available.
WID_NS_FILTER, ///< Filter list of available NewGRFs.
WID_NS_FILE_LIST, ///< List window of active NewGRFs.
WID_NS_SCROLLBAR, ///< Scrollbar for active NewGRF list.