diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -1046,7 +1046,7 @@ void QueryString::DrawEditBox(Window *w,
 	_cur_dpi = old_dpi;
 }
 
-int QueryStringBaseWindow::HandleEditBoxKey(int wid, uint16 key, uint16 keycode, EventState &state)
+HandleEditBoxResult QueryStringBaseWindow::HandleEditBoxKey(int wid, uint16 key, uint16 keycode, EventState &state)
 {
 	return this->QueryString::HandleEditBoxKey(this, wid, key, keycode, state);
 }
diff --git a/src/querystring_gui.h b/src/querystring_gui.h
--- a/src/querystring_gui.h
+++ b/src/querystring_gui.h
@@ -66,7 +66,7 @@ struct QueryStringBaseWindow : public Wi
 
 	void DrawEditBox(int wid);
 	void HandleEditBox(int wid);
-	int HandleEditBoxKey(int wid, uint16 key, uint16 keycode, EventState &state);
+	HandleEditBoxResult HandleEditBoxKey(int wid, uint16 key, uint16 keycode, EventState &state);
 	virtual void OnOpenOSKWindow(int wid);
 };