diff --git a/libs/langchain-openai/src/tools/dalle.ts b/libs/langchain-openai/src/tools/dalle.ts
index d3d45c6dba90..003c26faa5f9 100644
--- a/libs/langchain-openai/src/tools/dalle.ts
+++ b/libs/langchain-openai/src/tools/dalle.ts
@@ -145,7 +145,7 @@ export class DallEAPIWrapper extends Tool {
       apiKey: openAIApiKey,
       organization,
       dangerouslyAllowBrowser: true,
-      baseUrl: fields?.baseUrl,
+      baseURL: fields?.baseUrl,
     };
     this.client = new OpenAIClient(clientConfig);
     this.model = fields?.model ?? fields?.modelName ?? this.model;