diff --git a/pkg/dart2wasm/lib/code_generator.dart b/pkg/dart2wasm/lib/code_generator.dart
index 38e5219354c..5c3886ed6c4 100644
--- a/pkg/dart2wasm/lib/code_generator.dart
+++ b/pkg/dart2wasm/lib/code_generator.dart
@@ -3256,6 +3256,9 @@ class TearOffCodeGenerator extends AstCodeGenerator {
 
     b.pushObjectHeaderFields(info);
     b.local_get(paramLocals[0]); // `this` as context
+    // The closure requires a struct value so box `this` if necessary.
+    translator.convertType(b, paramLocals[0].type,
+        struct.fields[FieldIndex.closureContext].type.unpacked);
     translator.globals.readGlobal(b, closure.vtable);
     types.makeType(this, functionType);
     b.struct_new(struct);
diff --git a/tests/web/wasm/boxed_value_tearoff_test.dart b/tests/web/wasm/boxed_value_tearoff_test.dart
new file mode 100644
index 00000000000..f1be75ba0bc
--- /dev/null
+++ b/tests/web/wasm/boxed_value_tearoff_test.dart
@@ -0,0 +1,10 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:expect/expect.dart';
+
+void main() {
+  final tearoff = (-4).abs;
+  Expect.equals(tearoff(), 4);
+}