diff --git a/packages/dev/core/src/LibDeclarations/browser.d.ts b/packages/dev/core/src/LibDeclarations/browser.d.ts
index 8361145bbab..25080d265e0 100644
--- a/packages/dev/core/src/LibDeclarations/browser.d.ts
+++ b/packages/dev/core/src/LibDeclarations/browser.d.ts
@@ -120,5 +120,5 @@ declare const PressureObserver: {
     prototype: PressureObserver;
     new (callback: PressureUpdateCallback, options?: PressureObserverOptions): PressureObserver;
 
-    supportedSources: ReadonlyArray<PressureSource>;
+    knownSources: ReadonlyArray<PressureSource>;
 };
diff --git a/packages/dev/core/src/Misc/pressureObserverWrapper.ts b/packages/dev/core/src/Misc/pressureObserverWrapper.ts
index 596dbe704dc..295e79e0983 100644
--- a/packages/dev/core/src/Misc/pressureObserverWrapper.ts
+++ b/packages/dev/core/src/Misc/pressureObserverWrapper.ts
@@ -31,7 +31,7 @@ export class PressureObserverWrapper {
      * Returns true if PressureObserver is available for use, false otherwise.
      */
     public static get IsAvailable() {
-        return typeof PressureObserver !== "undefined" && PressureObserver.supportedSources.includes("cpu");
+        return typeof PressureObserver !== "undefined" && PressureObserver.knownSources.includes("cpu");
     }
 
     /**