diff --git a/common/levels.js b/common/levels.js
index 25c7ea0b..7f361f9e 100644
--- a/common/levels.js
+++ b/common/levels.js
@@ -89,7 +89,6 @@ var wrapping_groups = {
 			wrappers: [
 				// HRT
 				"Performance.prototype.now",
-				"window.PerformanceEntry",
 				// PT2
 				"performance.getEntries",
 				"performance.getEntriesByName",
diff --git a/common/wrappingS-HRT.js b/common/wrappingS-HRT.js
index 1aa0222c..1164988f 100644
--- a/common/wrappingS-HRT.js
+++ b/common/wrappingS-HRT.js
@@ -24,20 +24,6 @@
  * Create private namespace
  */
 (function() {
-	function changePropertyPrototype(name) {
-		let descriptor = Object.getOwnPropertyDescriptor(PerformanceEntry.prototype, name);
-		let originalF = descriptor['get'];
-		let replacementF = function() {
-			let originalVal = originalF.call(this, ...arguments);
-			return func(originalVal, precision);
-			// Replace this when injecting, to differ between startTime and duration functions
-			'__name__';
-		};
-		descriptor['get'] = replacementF;
-		original_functions[replacementF.toString()] = originalF.toString();
-		Object.defineProperty(PerformanceEntry.prototype, name, descriptor);
-	}
-
 	var wrappers = [
 		{
 			parent_object: "Performance.prototype",
@@ -68,21 +54,6 @@
 					return func(originalPerformanceValue, precision);
 				`
 		},
-		{
-			parent_object: "window",
-			parent_object_property: "PerformanceEntry",
-			wrapped_objects: [],
-			helping_code: rounding_function + noise_function + `
-			let precision = args[0];
-			let doNoise = args[1];
-			var func = rounding_function;
-			if (doNoise === true){
-				func = noise_function
-			}
-			(${changePropertyPrototype.toString().split("__name__").join('"startTime"')})('startTime');
-			(${changePropertyPrototype.toString().split("__name__").join('"duration"')})('duration');
-			`
-		}
 	];
 	add_wrappers(wrappers);
 })();