diff --git a/eos/effects/armorallrepairsystemsamountbonuspassive.py b/eos/effects/armorallrepairsystemsamountbonuspassive.py
index aff4d61e2..98e006558 100644
--- a/eos/effects/armorallrepairsystemsamountbonuspassive.py
+++ b/eos/effects/armorallrepairsystemsamountbonuspassive.py
@@ -10,4 +10,4 @@ type = "passive"
 def handler(fit, booster, context):
     fit.modules.filteredItemBoost(
         lambda mod: mod.item.requiresSkill("Repair Systems") or mod.item.requiresSkill("Capital Repair Systems"),
-        "armorDamageAmount", booster.getModifiedItemAttr("armorDamageAmountBonus"))
+        "armorDamageAmount", booster.getModifiedItemAttr("armorDamageAmountBonus") or 0)