diff --git a/lib/Lacuna/DB/Result/Spies.pm b/lib/Lacuna/DB/Result/Spies.pm
index 29391b57..2a38fa86 100644
--- a/lib/Lacuna/DB/Result/Spies.pm
+++ b/lib/Lacuna/DB/Result/Spies.pm
@@ -468,10 +468,12 @@ sub run_mission {
     my $power = $self->offense + $self->$mission_skill;
     my $toughness = 0;
     my $defender = $self->get_defender;
+    my $hfa = 0;
     if (defined $defender) {
         $toughness = $defender->defense + $defender->$mission_skill;
+        $hfa = $defender->home_field_advantage;
     }
-    my $breakthru = ($power - $toughness - $defender->home_field_advantage) + $self->luck;
+    my $breakthru = ($power - $toughness - $hfa) + $self->luck;
     
     # handle outcomes and xp
     my $out;
diff --git a/var/www/public/changes.txt b/var/www/public/changes.txt
index 1f5f29a5..1c95a76c 100644
--- a/var/www/public/changes.txt
+++ b/var/www/public/changes.txt
@@ -10,6 +10,7 @@
  - Fix: Police Station docs now show up under Modules instead of Buildings.
  - Fix: view_ships_orbiting will now return the ships that are orbiting your planet instead of just the count.
  - Fix: Fighters will return home after defending (instead of doubling the travel time).
+ - Fix: Fix defender's home field advantage.
 
 3.0402
  - API: Changed parliament propositions and laws to use email formatting rules.