diff --git a/qubesadmin/firewall.py b/qubesadmin/firewall.py
index 8af5a70..d86f8f4 100644
--- a/qubesadmin/firewall.py
+++ b/qubesadmin/firewall.py
@@ -66,6 +66,7 @@ class Action(RuleChoice):
     '''Rule action'''
     accept = 'accept'
     drop = 'drop'
+    forward = 'forward'
 
     @property
     def rule(self):