diff --git a/codex-rs/core/src/codex_thread.rs b/codex-rs/core/src/codex_thread.rs
index e08f127fea..3f0ed2121a 100644
--- a/codex-rs/core/src/codex_thread.rs
+++ b/codex-rs/core/src/codex_thread.rs
@@ -146,7 +146,7 @@ impl CodexThread {
     }
 
     pub fn realtime_voice_mode(&self) -> Option<RealtimeVoiceMode> {
-        self.codex.features().realtime_voice_mode()
+        self.codex.session.features().realtime_voice_mode()
     }
 
     pub fn realtime_voice_enabled(&self) -> bool {