diff --git a/packages/dbml-parse/src/lib/option.ts b/packages/dbml-parse/src/lib/option.ts
index 60d443f54..ed088caa9 100644
--- a/packages/dbml-parse/src/lib/option.ts
+++ b/packages/dbml-parse/src/lib/option.ts
@@ -26,6 +26,10 @@ export class Some<T> {
     return new Some(callback(this.value));
   }
 
+  is_some_and(callback: (_: T) => boolean): boolean {
+    return callback(this.value);
+  }
+
   // eslint-disable-next-line class-methods-use-this
   isOk(): boolean {
     return true;
@@ -53,6 +57,11 @@ export class None<T> {
     return new None();
   }
 
+  // eslint-disable-next-line class-methods-use-this
+  is_some_and(callback: (_: T) => boolean): boolean {
+    return false;
+  }
+
   // eslint-disable-next-line class-methods-use-this
   isOk(): boolean {
     return false;
diff --git a/packages/dbml-parse/src/lib/parser/utils.ts b/packages/dbml-parse/src/lib/parser/utils.ts
index 5c80284f2..595fa3246 100644
--- a/packages/dbml-parse/src/lib/parser/utils.ts
+++ b/packages/dbml-parse/src/lib/parser/utils.ts
@@ -48,7 +48,7 @@ export function convertFuncAppToElem(
   const attributeList =
     _.last(cpArgs) instanceof ListExpressionNode ? (cpArgs.pop() as ListExpressionNode) : undefined;
 
-  if (cpArgs.length === 3 && extractVariableNode(cpArgs[1]).unwrap().value === 'as') {
+  if (cpArgs.length === 3 && extractVariableNode(cpArgs[1]).is_some_and((token) => token.value === 'as')) {
     return new Some(
       factory.create(ElementDeclarationNode, {
         type,