diff --git a/pkg/analyzer/lib/src/generated/ffi_verifier.dart b/pkg/analyzer/lib/src/generated/ffi_verifier.dart
index 1945d8a00c6..58adcc8c045 100644
--- a/pkg/analyzer/lib/src/generated/ffi_verifier.dart
+++ b/pkg/analyzer/lib/src/generated/ffi_verifier.dart
@@ -156,6 +156,7 @@ class FfiVerifier extends RecursiveAstVisitor<void> {
       }
     }
     super.visitClassDeclaration(node);
+    inCompound = false;
   }
 
   @override
diff --git a/tests/ffi/regress_52298_test.dart b/tests/ffi/regress_52298_test.dart
new file mode 100644
index 00000000000..cbdc9c66047
--- /dev/null
+++ b/tests/ffi/regress_52298_test.dart
@@ -0,0 +1,17 @@
+// Copyright (c) 2023, 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 'dart:ffi';
+
+final class Foo extends Struct {
+  external Pointer<Void> field;
+}
+
+mixin Bar {
+  late final field = 123;
+}
+
+void main() {
+  print('something');
+}