diff --git a/src/smallmap_gui.cpp b/src/smallmap_gui.cpp
--- a/src/smallmap_gui.cpp
+++ b/src/smallmap_gui.cpp
@@ -1942,12 +1942,12 @@ static const NWidgetPart _nested_smallma
 	EndContainer(),
 };
 
-static NWidgetBase *SmallMapDisplay(int *biggest_index)
+static NWidgetBase *SmallMapDisplay()
 {
 	NWidgetContainer *map_display = new NWidgetSmallmapDisplay;
 
-	MakeNWidgets(std::begin(_nested_smallmap_display), std::end(_nested_smallmap_display), biggest_index, map_display);
-	MakeNWidgets(std::begin(_nested_smallmap_bar), std::end(_nested_smallmap_bar), biggest_index, map_display);
+	MakeNWidgets(std::begin(_nested_smallmap_display), std::end(_nested_smallmap_display), map_display);
+	MakeNWidgets(std::begin(_nested_smallmap_bar), std::end(_nested_smallmap_bar), map_display);
 	return map_display;
 }