diff --git a/pkg/dev_compiler/test/dynamic/platform_allowed.json b/pkg/dev_compiler/test/dynamic/platform_allowed.json
index a6efd91d279..4ae905fb6fd 100644
--- a/pkg/dev_compiler/test/dynamic/platform_allowed.json
+++ b/pkg/dev_compiler/test/dynamic/platform_allowed.json
@@ -25,9 +25,6 @@
     "Dynamic access of 'isNotEmpty'.": 1,
     "Dynamic invocation of 'allMatches'.": 1
   },
-  "sdk/lib/_internal/js_dev_runtime/private/native_typed_data.dart": {
-    "Dynamic invocation of '|'.": 3
-  },
   "sdk/lib/_internal/js_dev_runtime/patch/convert_patch.dart": {
     "Dynamic invocation of 'clear'.": 1
   },
diff --git a/sdk/lib/_internal/js_dev_runtime/private/native_typed_data.dart b/sdk/lib/_internal/js_dev_runtime/private/native_typed_data.dart
index 12c43888380..2ff8abd99b4 100644
--- a/sdk/lib/_internal/js_dev_runtime/private/native_typed_data.dart
+++ b/sdk/lib/_internal/js_dev_runtime/private/native_typed_data.dart
@@ -1319,7 +1319,7 @@ final class NativeFloat32x4 implements Float32x4 {
   /// Extract the sign bit from each lane return them in the first 4 bits.
   int get signMask {
     var view = _uint32view;
-    var mx, my, mz, mw;
+    int mx, my, mz, mw;
     _list[0] = x;
     _list[1] = y;
     _list[2] = z;