diff --git a/arkoala-arkts/libarkts/examples/src/builder-lambda-transformer.ts b/arkoala-arkts/libarkts/examples/src/builder-lambda-transformer.ts
index c5de79be8fae8d85b84e3dfd326f4bb61288273f..e0962ede5d5f48a3facb32573623e70e6ca36113 100644
--- a/arkoala-arkts/libarkts/examples/src/builder-lambda-transformer.ts
+++ b/arkoala-arkts/libarkts/examples/src/builder-lambda-transformer.ts
@@ -94,7 +94,9 @@ function builderLambdaFunctionName(node: arkts.CallExpression): undefined | stri
     if (annotation.expr.name !== "BuilderLambda") {
         return undefined
     }
-    if (!arkts.isStringLiteral(annotation.properties[0].value)) {
+    if (!annotation.properties[0].value ||
+        !arkts.isStringLiteral(annotation.properties[0].value)
+    ) {
         return undefined
     }
 
diff --git a/arkoala-arkts/libarkts/src/arkts-api/types.ts b/arkoala-arkts/libarkts/src/arkts-api/types.ts
index 283a0f1d47b3ec8064c9fd251d79f8db6cc8b43c..70da98567d953c707c48c8a63200097ed34af1f8 100644
--- a/arkoala-arkts/libarkts/src/arkts-api/types.ts
+++ b/arkoala-arkts/libarkts/src/arkts-api/types.ts
@@ -1076,11 +1076,11 @@ export class ClassElement extends Node {
     constructor(peer: KPtr) {
         super(peer)
         this.key = unpackNonNullableNode(global.es2panda._ClassElementKey(global.context, this.peer))
-        this.value = unpackNonNullableNode(global.es2panda._ClassElementValue(global.context, this.peer))
+        this.value = unpackNode(global.es2panda._ClassElementValue(global.context, this.peer))
     }
 
     readonly key: Node
-    readonly value: Node
+    readonly value?: Node
 }
 
 export class ClassProperty extends ClassElement {