diff --git a/net b/net
index bc5139f..6b145d2 100755
--- a/net
+++ b/net
@@ -349,7 +349,7 @@ def get_routes():
         route = {'target': target,
                  'netmask': netmask,
         }
-        for i in xrange(0, len(attrs), 2):
+        for i in xrange(0, len(attrs) & ~1, 2):
             route[attrs[i]] = attrs[i + 1]
         routes.append(route)
     return routes