diff --git a/src/common/file_props.py b/src/common/file_props.py
index 8cf8e1d5a90d2cf4de58c9a4c847ab6a63ed55d9..808db80fd8b2c589bc5ce6b680361d90bbb4ee88 100644
--- a/src/common/file_props.py
+++ b/src/common/file_props.py
@@ -110,7 +110,8 @@ class FileProp(object):
         # transfer type: 's' for sending and 'r' for receiving
         self.type_ = None
         self.error = None
-        self.elapsed_time = None
+        # Elapsed time of the file transfer
+        self.elapsed_time = 0
         self.last_time = None
         self.received_len = None
         # full file path