diff --git a/qubes/firewall.py b/qubes/firewall.py
index b3b0a3af..2cddce16 100644
--- a/qubes/firewall.py
+++ b/qubes/firewall.py
@@ -76,6 +76,7 @@ class RuleChoice(RuleOption):
 class Action(RuleChoice):
     accept = 'accept'
     drop = 'drop'
+    forward= = 'forward'
 
     @property
     def rule(self):