diff --git a/studio/frontend/src/features/chat/types/api.ts b/studio/frontend/src/features/chat/types/api.ts
index 228cbb62ab..97fa39065a 100644
--- a/studio/frontend/src/features/chat/types/api.ts
+++ b/studio/frontend/src/features/chat/types/api.ts
@@ -196,7 +196,7 @@ export interface OpenAIChatCompletionsRequest {
   top_k?: number;
   min_p?: number;
   repetition_penalty?: number;
-  presence_penalty: number;
+  presence_penalty?: number;
   image_base64?: string;
   audio_base64?: string;
   use_adapter?: boolean | string | null;