diff --git a/src/bootstrap_gui.cpp b/src/bootstrap_gui.cpp
--- a/src/bootstrap_gui.cpp
+++ b/src/bootstrap_gui.cpp
@@ -32,7 +32,7 @@
 #include "safeguards.h"
 
 /** Widgets for the background window to prevent smearing. */
-static const struct NWidgetPart _background_widgets[] = {
+static const NWidgetPart _background_widgets[] = {
 	NWidget(WWT_PANEL, COLOUR_DARK_BLUE, WID_BB_BACKGROUND), SetResize(1, 1),
 	EndContainer(),
 };