diff --git a/src/news_gui.cpp b/src/news_gui.cpp
index 314f268cf9..b1ca87f7df 100644
--- a/src/news_gui.cpp
+++ b/src/news_gui.cpp
@@ -1121,7 +1121,8 @@ struct MessageOptionsWindow : Window {
 
 	virtual void OnInit()
 	{
-		this->dim_message_opt = {0, 0};
+		this->dim_message_opt.width  = 0;
+		this->dim_message_opt.height = 0;
 		for (const StringID *str = message_opt; *str != INVALID_STRING_ID; str++) this->dim_message_opt = maxdim(this->dim_message_opt, GetStringBoundingBox(*str));
 	}