diff --git a/async-openai/src/types/realtime/session_resource.rs b/async-openai/src/types/realtime/session_resource.rs
index 10472414..2ed46a27 100644
--- a/async-openai/src/types/realtime/session_resource.rs
+++ b/async-openai/src/types/realtime/session_resource.rs
@@ -4,9 +4,9 @@ use serde::{Deserialize, Serialize};
 pub enum AudioFormat {
     #[serde(rename = "pcm16")]
     PCM16,
-    #[serde(rename = "g711-ulaw")]
+    #[serde(rename = "g711_ulaw")]
     G711ULAW,
-    #[serde(rename = "g711-alaw")]
+    #[serde(rename = "g711_alaw")]
     G711ALAW,
 }