diff --git a/codex-rs/keyring-store/src/split_json.rs b/codex-rs/keyring-store/src/split_json.rs
index 75ac219b79..1280292506 100644
--- a/codex-rs/keyring-store/src/split_json.rs
+++ b/codex-rs/keyring-store/src/split_json.rs
@@ -280,6 +280,7 @@ fn load_full_json_from_keyring<K: KeyringStore + ?Sized>(
     }
 }
 
+#[cfg(not(windows))]
 fn save_full_json_to_keyring<K: KeyringStore + ?Sized>(
     keyring_store: &K,
     service: &str,