diff --git a/bin/cros_image_to_target.py b/bin/cros_image_to_target.py
index 2c614eee0b..91774eb56b 100755
--- a/bin/cros_image_to_target.py
+++ b/bin/cros_image_to_target.py
@@ -575,7 +575,7 @@ class ChildFinished(Exception):
         raise self
 
 def MakePortList(user_supplied_port):
-  range_start = 8081
+  range_start = user_supplied_port or 8081
   port_list = []
   if user_supplied_port is not None:
     range_length = 1