diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
index 74b5c2b2ab..28ae594fe5 100644
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -1429,7 +1429,7 @@ static const NWidgetPart _nested_query_string_widgets[] = {
 		NWidget(WWT_CAPTION, COLOUR_GREY, QUERY_STR_WIDGET_CAPTION), SetDataTip(STR_WHITE_STRING, STR_NULL),
 	EndContainer(),
 	NWidget(WWT_PANEL, COLOUR_GREY, QUERY_STR_WIDGET_BACKGROUND),
-		NWidget(WWT_EDITBOX, COLOUR_GREY, QUERY_STR_WIDGET_TEXT), SetMinimalSize(256, 12), SetPadding(2, 2, 2, 2),
+		NWidget(WWT_EDITBOX, COLOUR_GREY, QUERY_STR_WIDGET_TEXT), SetMinimalSize(256, 12), SetFill(true, true), SetPadding(2, 2, 2, 2),
 	EndContainer(),
 	NWidget(NWID_HORIZONTAL, NC_EQUALSIZE),
 		NWidget(WWT_TEXTBTN, COLOUR_GREY, QUERY_STR_WIDGET_DEFAULT), SetMinimalSize(87, 12), SetFill(true, true), SetDataTip(STR_BUTTON_DEFAULT, STR_NULL),