diff --git a/async-openai/src/types/chat.rs b/async-openai/src/types/chat.rs
index 138d685..b9e8623 100644
--- a/async-openai/src/types/chat.rs
+++ b/async-openai/src/types/chat.rs
@@ -699,6 +699,7 @@ pub struct ChatChoice {
 #[derive(Debug, Deserialize, Clone, PartialEq, Serialize)]
 pub struct CreateChatCompletionResponse {
     /// A unique identifier for the chat completion.
+    #[serde(default)]
     pub id: String,
     /// A list of chat completion choices. Can be more than one if `n` is greater than 1.
     pub choices: Vec<ChatChoice>,