diff --git a/eos/effects/modulebonusfightersupportunit.py b/eos/effects/modulebonusfightersupportunit.py
index 93a4c22f4..e79f21515 100644
--- a/eos/effects/modulebonusfightersupportunit.py
+++ b/eos/effects/modulebonusfightersupportunit.py
@@ -9,13 +9,13 @@ def handler(fit, src, context):
     fit.fighters.filteredItemMultiply(lambda mod: mod.item.requiresSkill("Fighters"), "shieldCapacity",
                                    src.getModifiedItemAttr("fighterBonusShieldCapacityPercent"))
     fit.fighters.filteredItemMultiply(lambda mod: mod.item.requiresSkill("Fighters"), "maxVelocity",
-                                   src.getModifiedItemAttr("fighterBonusVelocityPercent"), stackingPenalties=True)
+                                   src.getModifiedItemAttr("fighterBonusVelocityPercent"), stackingPenalties=True, penaltyGroup="postMul")
     fit.fighters.filteredItemMultiply(lambda mod: mod.item.requiresSkill("Fighters"),
                                    "fighterAbilityAttackMissileDuration",
-                                   src.getModifiedItemAttr("fighterBonusROFPercent"), stackingPenalties=True)
+                                   src.getModifiedItemAttr("fighterBonusROFPercent"), stackingPenalties=True, penaltyGroup="postMul")
     fit.fighters.filteredItemMultiply(lambda mod: mod.item.requiresSkill("Fighters"), "fighterAbilityAttackTurretDuration",
-                                   src.getModifiedItemAttr("fighterBonusROFPercent"), stackingPenalties=True)
+                                   src.getModifiedItemAttr("fighterBonusROFPercent"), stackingPenalties=True, penaltyGroup="postMul")
     fit.fighters.filteredItemMultiply(lambda mod: mod.item.requiresSkill("Fighters"), "fighterAbilityMissilesDuration",
-                                   src.getModifiedItemAttr("fighterBonusROFPercent"), stackingPenalties=True)
+                                   src.getModifiedItemAttr("fighterBonusROFPercent"), stackingPenalties=True, penaltyGroup="postMul")
     fit.fighters.filteredItemMultiply(lambda mod: mod.item.requiresSkill("Fighters"), "shieldRechargeRate",
                                    src.getModifiedItemAttr("fighterBonusShieldRechargePercent"))