diff --git a/script/devices/StdDaq.py b/script/devices/StdDaq.py
index 7107029..650dcd4 100644
--- a/script/devices/StdDaq.py
+++ b/script/devices/StdDaq.py
@@ -26,7 +26,7 @@ class StdDaq(DeviceBase):
             data = {"sources":"eiger", "n_images":10, "output_file":"/tmp/test.h5"}
             headers = {'Content-type': 'application/json'}
             r = requests.post(url = self.url + "/write_async", json=data, headers=headers)
-            self.req_id = int(str(r.json()["request_id"])
+            self.req_id = int(str(r.json()["request_id"]))
             
         else:
             self.req_id = self.simulated_id