diff --git a/sensgw/protocols/prologix.py b/sensgw/protocols/prologix.py
index 5ca4767..4c175c9 100644
--- a/sensgw/protocols/prologix.py
+++ b/sensgw/protocols/prologix.py
@@ -145,7 +145,7 @@ class PrologixEndpointLoop:
             self._adapter = PrologixAdapter(
                 res,
                 gpib_read_timeout=gpib_to_ms,
-                serial_timeout=serial_to_ms,
+                timeout=serial_to_ms,
                 auto=False,
             )