diff --git a/backend/windmill-worker/src/worker.rs b/backend/windmill-worker/src/worker.rs
index 2c8f06bb40..6a8b03701b 100644
--- a/backend/windmill-worker/src/worker.rs
+++ b/backend/windmill-worker/src/worker.rs
@@ -1774,7 +1774,7 @@ async fn handle_python_job(
     } else {
         sig.args
             .into_iter()
-            .map(|x| format!("args[\"{}\"] = kwargs[\"{}\"]", x.name, x.name))
+            .map(|x| format!("args[\"{}\"] = kwargs.get(\"{}\")", x.name, x.name))
             .join("\n")
     };