diff --git a/src/openrct2-ui/windows/Finances.cpp b/src/openrct2-ui/windows/Finances.cpp
index deab08086e..e1935afee9 100644
--- a/src/openrct2-ui/windows/Finances.cpp
+++ b/src/openrct2-ui/windows/Finances.cpp
@@ -386,8 +386,6 @@ static rct_window_event_list *window_finances_page_events[] = {
     &window_finances_research_events
 };
 
-static void window_finances_set_colours();
-
 #pragma endregion
 
 #pragma region Enabled widgets