diff --git a/www/js/interface.js b/www/js/interface.js
index d566378..80ddfc9 100644
--- a/www/js/interface.js
+++ b/www/js/interface.js
@@ -295,8 +295,8 @@ const INTERFACE = {
         INTERFACE.resize();
         INTERFACE.resolve_board();
 
-        let width = canvas.width * window.devicePixelRatio;
-        let height = canvas.height * window.devicePixelRatio;
+        let width = canvas.width;
+        let height = canvas.height;
 
         let gui_margin = INTERFACE_DATA.Ui.margin;
         let gui_offset = INTERFACE_DATA.Ui.offset;