diff --git a/common/ruletypes.h b/common/ruletypes.h
index 15cc43575..5a30bfc2c 100644
--- a/common/ruletypes.h
+++ b/common/ruletypes.h
@@ -368,6 +368,7 @@ RULE_BOOL(Spells, AllowItemTGB, false, "Target group buff (/tgb) doesn't work wi
 RULE_BOOL(Spells, NPCInnateProcOverride, true, "NPC innate procs override the target type to single target")
 RULE_BOOL(Spells, OldRainTargets, false, "Use old incorrectly implemented maximum targets for rains")
 RULE_BOOL(Spells, NPCSpellPush, false, "Enable spell push on NPCs")
+RULE_BOOL(Spells, July242002PetResists, true, "Enable Pets using PCs resist change from July 24 2002")
 RULE_CATEGORY_END()
 
 RULE_CATEGORY(Combat)
diff --git a/zone/spells.cpp b/zone/spells.cpp
index ed4c6c57a..13c7ff1cf 100644
--- a/zone/spells.cpp
+++ b/zone/spells.cpp
@@ -4531,7 +4531,7 @@ float Mob::ResistSpell(uint8 resist_type, uint16 spell_id, Mob *caster, bool use
 
 	// JULY 24, 2002 changes
 	int level = GetLevel();
-	if (IsPetOwnerClient() && caster->IsNPC() && !caster->IsPetOwnerClient()) {
+	if (RuleB(Spells,July242002PetResists) && IsPetOwnerClient() && caster->IsNPC() && !caster->IsPetOwnerClient()) {
 		auto owner = GetOwner();
 		if (owner != nullptr) {
 			target_resist = std::max(target_resist, owner->GetResist(resist_type));