diff --git a/packages/recorder/src/watchers/canvas/2d.ts b/packages/recorder/src/watchers/canvas/2d.ts
index 38e6f1eb..73faf89d 100644
--- a/packages/recorder/src/watchers/canvas/2d.ts
+++ b/packages/recorder/src/watchers/canvas/2d.ts
@@ -130,7 +130,7 @@ export class Canvas2DWatcher extends Watcher<CanvasRecord> {
             })
 
             this.uninstall(() => {
-                Object.defineProperty(ctxProto, name, original)
+                Object.defineProperty(ctx, name, descriptor!)
             })
         })
     }
diff --git a/packages/recorder/src/watchers/canvas/webgl.ts b/packages/recorder/src/watchers/canvas/webgl.ts
index 476687f9..cc976923 100644
--- a/packages/recorder/src/watchers/canvas/webgl.ts
+++ b/packages/recorder/src/watchers/canvas/webgl.ts
@@ -170,7 +170,7 @@ export class CanvasWebGLWatcher extends Watcher<CanvasRecord> {
             })
 
             this.uninstall(() => {
-                Object.defineProperty(ctx, name, original)
+                Object.defineProperty(ctx, name, descriptor!)
             })
         }
     }