diff --git a/jobmanager/jobmanager.py b/jobmanager/jobmanager.py
index 66ae3ae..813c1f1 100644
--- a/jobmanager/jobmanager.py
+++ b/jobmanager/jobmanager.py
@@ -1775,7 +1775,7 @@ class JobManager_Server(object):
                 old_bytes = bytes_recieved
                 bytes_recieved = self.result_q.get_bytes_recieved()
                 curr_time = time.time()
-                data_speed = humanize_size((bytes_recieved - old_bytes) / (curr_time - old_time))
+                data_speed = humanize_size((bytes_recieved - old_bytes)) / (curr_time - old_time)
                 if (self.timeout is not None):
                     time_left = int(self.timeout - self.__wait_before_stop - (datetime.now() - self.start_time).total_seconds())
                     if time_left < 0: