diff --git a/src/smallmap_gui.cpp b/src/smallmap_gui.cpp
--- a/src/smallmap_gui.cpp
+++ b/src/smallmap_gui.cpp
@@ -1055,12 +1055,12 @@ public:
 SmallMapWindow::SmallMapType SmallMapWindow::map_type = SMT_CONTOUR;
 bool SmallMapWindow::show_towns = true;
 
-static const WindowDesc _smallmap_desc = {
+static const WindowDesc _smallmap_desc(
 	WDP_AUTO, WDP_AUTO, 350, 214, 446, 314,
 	WC_SMALLMAP, WC_NONE,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_STICKY_BUTTON | WDF_RESIZABLE,
-	_smallmap_widgets,
-};
+	_smallmap_widgets
+);
 
 void ShowSmallMap()
 {
@@ -1197,12 +1197,12 @@ public:
 	}
 };
 
-static const WindowDesc _extra_view_port_desc = {
+static const WindowDesc _extra_view_port_desc(
 	WDP_AUTO, WDP_AUTO, 300, 68, 300, 268,
 	WC_EXTRA_VIEW_PORT, WC_NONE,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS | WDF_STICKY_BUTTON | WDF_RESIZABLE,
-	_extra_view_port_widgets,
-};
+	_extra_view_port_widgets
+);
 
 void ShowExtraViewPortWindow(TileIndex tile)
 {