diff --git a/headphones/transmission.py b/headphones/transmission.py
index 493a725a..3cbb021f 100644
--- a/headphones/transmission.py
+++ b/headphones/transmission.py
@@ -93,7 +93,7 @@ def torrentAction(method, arguments):
         # Check if it ends in a port number
         i = host.rfind(':')
         if i >= 0:
-            possible_port = host[i+1]
+            possible_port = host[i+1:]
             try:
                 port = int(possible_port)
                 host = host + "/transmission/rpc"