diff --git a/ets2panda/checker/ets/object.cpp b/ets2panda/checker/ets/object.cpp
index 9c9cd7bd4e1f5db01d351cb58a1b9ab01f63e05f..9c183122991728f4162dea21ff2430f89d668340 100644
--- a/ets2panda/checker/ets/object.cpp
+++ b/ets2panda/checker/ets/object.cpp
@@ -850,6 +850,10 @@ void ETSChecker::CheckConstFieldInitialized(const ETSObjectType *class_type, var
 {
     const bool class_var_static = class_var->Declaration()->Node()->AsClassProperty()->IsStatic();
     for (const auto &prop : class_type->Methods()) {
+        if (!prop->TsType()->IsETSFunctionType()) {
+            continue;
+        }
+
         const auto &call_sigs = prop->TsType()->AsETSFunctionType()->CallSignatures();
         for (const auto *signature : call_sigs) {
             if ((signature->Function()->IsConstructor() && !class_var_static) ||
diff --git a/ets2panda/test/runtime/ets/lambda-class-field.ets b/ets2panda/test/runtime/ets/lambda-class-field.ets
new file mode 100644
index 0000000000000000000000000000000000000000..2bca2ab41562fb323d843d96c7a5cb0300f0f473
--- /dev/null
+++ b/ets2panda/test/runtime/ets/lambda-class-field.ets
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class cls {
+  lambda_field: (() => int) | undefined;
+  readonly num: int; // don't remove it, it is necessary to trigger an issue with the lambda
+}
+
+function main(): void {
+  let c = new cls();
+  c.lambda_field = () => 42;
+  assert c.lambda_field() == 42;
+  assert c.num == 0;
+}