diff --git a/src/css/dynamic_ui.scss b/src/css/dynamic_ui.scss
index e90e0b24..5d9b3b1d 100644
--- a/src/css/dynamic_ui.scss
+++ b/src/css/dynamic_ui.scss
@@ -9,8 +9,7 @@
 
 // Helper method to scale a value, for use in calc() etc
 @function D($v) {
-    $baseValue: strip-unit($v) * 1px;
-    @return calc(#{$baseValue} * var(--ui-scale));
+    @return strip-unit($v) * 0.1rem;
 }
 
 // Helper method to scale a property value
diff --git a/src/js/application.js b/src/js/application.js
index 2de49a7d..1204ad0a 100644
--- a/src/js/application.js
+++ b/src/js/application.js
@@ -7,7 +7,7 @@ import { Loader } from "./core/loader";
 import { createLogger } from "./core/logging";
 import { StateManager } from "./core/state_manager";
 import { TrackedState } from "./core/tracked_state";
-import { getPlatformName, waitNextFrame } from "./core/utils";
+import { getPlatformName, round2Digits, waitNextFrame } from "./core/utils";
 import { Vector } from "./core/vector";
 import { MOD_SIGNALS } from "./mods/mod_signals";
 import { MODS } from "./mods/modloader";
@@ -321,7 +321,7 @@ export class Application {
             }
 
             const scale = this.getEffectiveUiScale();
-            waitNextFrame().then(() => document.documentElement.style.setProperty("--ui-scale", `${scale}`));
+            document.documentElement.style.fontSize = `${round2Digits(scale * 10)}px`;
             window.focus();
         }
     }
diff --git a/src/js/mods/mod_interface.js b/src/js/mods/mod_interface.js
index e2bb15b4..578d2bfe 100644
--- a/src/js/mods/mod_interface.js
+++ b/src/js/mods/mod_interface.js
@@ -67,11 +67,8 @@ export class ModInterface {
         this.modLoader = modLoader;
     }
 
+    /** @deprecated */
     registerCss(cssString) {
-        // Preprocess css
-        cssString = cssString.replace(/\$scaled\(([^)]*)\)/gim, (substr, expression) => {
-            return "calc((" + expression + ") * var(--ui-scale))";
-        });
         const element = document.createElement("style");
         element.textContent = cssString;
         document.head.appendChild(element);