diff --git a/async-openai/src/types/realtime/session_resource.rs b/async-openai/src/types/realtime/session_resource.rs
index dc0d1e70..d1bd7691 100644
--- a/async-openai/src/types/realtime/session_resource.rs
+++ b/async-openai/src/types/realtime/session_resource.rs
@@ -37,8 +37,7 @@ pub enum TurnDetection {
 #[serde(untagged)]
 pub enum MaxResponseOutputTokens {
     Num(u16),
-    #[serde(rename = "inf")]
-    Inf,
+    Inf(String),
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone)]