diff --git a/CHANGELOG.md b/CHANGELOG.md
index b0d08774093..a0982c4fa0a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,14 @@ opted out of null safety by adding `// @dart=2.9` to the beginning of the file.
 * `LinkedList` made it explicit that elements are compared by identity,
   and updated `contains` to take advantage of this.
 
+#### `dart:html`
+
+* `EventStreamSubscription.cancel` has been updated to retain its synchronous
+  timing when running in both sound and unsound null safety modes. See issue
+  [#44157][] for more details.
+
+[#44157]: https://github.com/dart-lang/sdk/issues/44157
+
 ### Dart VM
 
 *   **Breaking Change** [#42312][]: `Dart_WeakPersistentHandle`s will no longer
diff --git a/pkg/dev_compiler/lib/src/kernel/compiler.dart b/pkg/dev_compiler/lib/src/kernel/compiler.dart
index 8800d4c562e..87fed8fc870 100644
--- a/pkg/dev_compiler/lib/src/kernel/compiler.dart
+++ b/pkg/dev_compiler/lib/src/kernel/compiler.dart
@@ -5530,27 +5530,6 @@ class ProgramCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
   js_ast.Expression visitAsExpression(AsExpression node) {
     var fromExpr = node.operand;
     var jsFrom = _visitExpression(fromExpr);
-
-    // The `_EventStreamSubscription.cancel()` method dart:html returns null in
-    // weak mode. This causes unwanted warnings/failures when you turn on the
-    // weak mode warnings/errors so we remove these specific runtime casts.
-    // TODO(44157) Remove this workaround once it returns a consistent type.
-    if (_isWebLibrary(currentLibraryUri) && node.parent is ReturnStatement) {
-      var parent = node.parent;
-      while (parent != null && parent is! FunctionNode) {
-        parent = parent?.parent;
-      }
-      parent = parent?.parent;
-      if (parent is Procedure) {
-        if (parent.enclosingClass != null &&
-            parent.enclosingClass.name == '_EventStreamSubscription' &&
-            parent.name.name == 'cancel') {
-          // Ignore these casts and just emit the expression.
-          return jsFrom;
-        }
-      }
-    }
-
     var to = node.type;
     var from = fromExpr.getStaticType(_staticTypeContext);
 
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index a79aff6f7a6..bc7bdfbc053 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -37285,18 +37285,13 @@ class _EventStreamSubscription<T extends Event> extends StreamSubscription<T> {
   }
 
   Future cancel() {
-    // Check for strong mode. This function can no longer return null in strong
-    // mode, so only return null in weak mode to preserve synchronous timing.
-    // See issue 41653 for more details.
-    dynamic emptyFuture =
-        typeAcceptsNull<Event>() ? null : Future<void>.value();
-    if (_canceled) return emptyFuture as Future;
+    if (_canceled) return nullFuture;
 
     _unlisten();
     // Clear out the target to indicate this is complete.
     _target = null;
     _onData = null;
-    return emptyFuture as Future;
+    return nullFuture;
   }
 
   bool get _canceled => _target == null;
diff --git a/tools/dom/src/EventStreamProvider.dart b/tools/dom/src/EventStreamProvider.dart
index fe01be9be79..feadc26d26f 100644
--- a/tools/dom/src/EventStreamProvider.dart
+++ b/tools/dom/src/EventStreamProvider.dart
@@ -248,18 +248,13 @@ class _EventStreamSubscription<T extends Event> extends StreamSubscription<T> {
   }
 
   Future cancel() {
-    // Check for strong mode. This function can no longer return null in strong
-    // mode, so only return null in weak mode to preserve synchronous timing.
-    // See issue 41653 for more details.
-    dynamic emptyFuture =
-        typeAcceptsNull<Event>() ? null : Future<void>.value();
-    if (_canceled) return emptyFuture as Future;
+    if (_canceled) return nullFuture;
 
     _unlisten();
     // Clear out the target to indicate this is complete.
     _target = null;
     _onData = null;
-    return emptyFuture as Future;
+    return nullFuture;
   }
 
   bool get _canceled => _target == null;