1 files changed, 1 insertions, 0 deletions
diff --git a/gui.h b/gui.h
index 0da9e557c..0786c8c53 100644
--- a/gui.h
+++ b/gui.h
@@ -13,6 +13,7 @@ void ShowGameOptions();
 void ShowGameDifficulty();
 void ShowPatchesSelection();
 void ShowNewgrf();
+void ShowCustCurrency();
 
 /* graph_gui.c */
 void ShowOperatingProfitGraph();