diff --git a/pkg/linter/lib/src/rules/switch_on_type.dart b/pkg/linter/lib/src/rules/switch_on_type.dart
index 259593051c2..17f36deaae7 100644
--- a/pkg/linter/lib/src/rules/switch_on_type.dart
+++ b/pkg/linter/lib/src/rules/switch_on_type.dart
@@ -69,7 +69,7 @@ class _Visitor extends SimpleAstVisitor<void> {
 
   /// Returns `true` if the [type] is assignable to [Type].
   bool _isAssignableToType(DartType? type) {
-    if (type == null) return false;
+    if (type == null || type is DynamicType) return false;
     return context.typeSystem.isAssignableTo(type, _typeType);
   }
 
diff --git a/pkg/linter/test/rules/switch_on_type_test.dart b/pkg/linter/test/rules/switch_on_type_test.dart
index 6791a061d34..98b372d7fb6 100644
--- a/pkg/linter/test/rules/switch_on_type_test.dart
+++ b/pkg/linter/test/rules/switch_on_type_test.dart
@@ -60,6 +60,14 @@ void f(Type t) {
     );
   }
 
+  Future<void> test_dynamic() async {
+    await assertNoDiagnostics('''
+void foo(dynamic a) {
+  switch (a) {}
+}
+''');
+  }
+
   Future<void> test_functionToString() async {
     await assertNoDiagnostics('''
 void f() {