diff --git a/pymodbus/pdu/pdu.py b/pymodbus/pdu/pdu.py
index e857cba5d..933d727fb 100644
--- a/pymodbus/pdu/pdu.py
+++ b/pymodbus/pdu/pdu.py
@@ -68,7 +68,7 @@ def __str__(self) -> str:
             f"count={self.count}, "
             f"bits={self.bits!s}, "
             f"registers={self.registers!s}, "
-            f"status={self.status!s}"
+            f"status={self.status!s}, "
             f"retries={self.retries})"
         )