diff --git a/src/terraform_gui.cpp b/src/terraform_gui.cpp
--- a/src/terraform_gui.cpp
+++ b/src/terraform_gui.cpp
@@ -325,12 +325,12 @@ static const Widget _terraform_widgets[]
 {   WIDGETS_END},
 };
 
-static const WindowDesc _terraform_desc = {
+static const WindowDesc _terraform_desc(
 	WDP_ALIGN_TBR, 22 + 36, 158, 36, 158, 36,
 	WC_SCEN_LAND_GEN, WC_NONE,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_STICKY_BUTTON | WDF_CONSTRUCTION,
-	_terraform_widgets,
-};
+	_terraform_widgets
+);
 
 void ShowTerraformToolbar(Window *link)
 {
@@ -706,12 +706,12 @@ struct ScenarioEditorLandscapeGeneration
 	}
 };
 
-static const WindowDesc _scen_edit_land_gen_desc = {
+static const WindowDesc _scen_edit_land_gen_desc(
 	WDP_AUTO, WDP_AUTO, 163, 103, 163, 103,
 	WC_SCEN_LAND_GEN, WC_NONE,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_STICKY_BUTTON | WDF_CONSTRUCTION,
-	_scen_edit_land_gen_widgets,
-};
+	_scen_edit_land_gen_widgets
+);
 
 void ShowEditorTerraformToolbar()
 {