diff --git a/codex-rs/core/src/tools/handlers/multi_agents/spawn.rs b/codex-rs/core/src/tools/handlers/multi_agents/spawn.rs
index 3ae4597a8d..4bef4af391 100644
--- a/codex-rs/core/src/tools/handlers/multi_agents/spawn.rs
+++ b/codex-rs/core/src/tools/handlers/multi_agents/spawn.rs
@@ -59,10 +59,8 @@ impl ToolHandler for Handler {
                 .into(),
             )
             .await;
-        let mut config = build_agent_spawn_config(
-            session.get_base_instructions().await.as_ref(),
-            turn.as_ref(),
-        )?;
+        let mut config =
+            build_agent_spawn_config(&session.get_base_instructions().await, turn.as_ref())?;
         if !args.fork_context {
             apply_requested_spawn_agent_model_overrides(
                 &session,
diff --git a/codex-rs/core/src/tools/handlers/multi_agents_v2/spawn.rs b/codex-rs/core/src/tools/handlers/multi_agents_v2/spawn.rs
index cdd737eba5..643c972463 100644
--- a/codex-rs/core/src/tools/handlers/multi_agents_v2/spawn.rs
+++ b/codex-rs/core/src/tools/handlers/multi_agents_v2/spawn.rs
@@ -69,10 +69,8 @@ impl ToolHandler for Handler {
                 .into(),
             )
             .await;
-        let mut config = build_agent_spawn_config(
-            session.get_base_instructions().await.as_ref(),
-            turn.as_ref(),
-        )?;
+        let mut config =
+            build_agent_spawn_config(&session.get_base_instructions().await, turn.as_ref())?;
         if fork_mode.is_none() {
             apply_requested_spawn_agent_model_overrides(
                 &session,