=== modified file 'mandos'
--- mandos	2016-06-22 05:30:59 +0000
+++ mandos	2016-06-23 19:07:23 +0000
@@ -2453,6 +2453,7 @@
         """This overrides the normal server_bind() function
         to bind to an interface if one was specified, and also NOT to
         bind to an address or port if they were not specified."""
+        global SO_BINDTODEVICE
         if self.interface is not None:
             if SO_BINDTODEVICE is None:
                 # Fall back to a hard-coded value which seems to be