diff --git a/src/windows/custom_currency.c b/src/windows/custom_currency.c
index d4e5104538..aeec7f9547 100644
--- a/src/windows/custom_currency.c
+++ b/src/windows/custom_currency.c
@@ -55,8 +55,6 @@ static void custom_currency_window_dropdown(rct_window *w, int widgetIndex, int
 static void custom_currency_window_text_input(struct rct_window *w, int windgetIndex, char *text);
 static void custom_currency_window_paint(rct_window *w, rct_drawpixelinfo *dpi);
 
-static void custom_currency_invalidate_money_widgets();
-
 
 static rct_window_event_list _windowCustomCurrencyEvents = {
 	NULL,
@@ -233,11 +231,6 @@ static void custom_currency_window_text_input(struct rct_window *w, int windgetI
 	}
 }
 
-static void custom_currency_invalidate_money_widgets()
-{
-	window_invalidate_all();
-}
-
 
 static void custom_currency_window_paint(rct_window *w, rct_drawpixelinfo *dpi)
 {