diff --git a/sim/core/major_cooldown.go b/sim/core/major_cooldown.go
index 03b13963ec..a316cb620b 100644
--- a/sim/core/major_cooldown.go
+++ b/sim/core/major_cooldown.go
@@ -183,8 +183,6 @@ type majorCooldownManager struct {
 	// the course of the sim.
 	majorCooldowns []*MajorCooldown
 	minReady       time.Duration
-
-	tryUsing bool
 }
 
 func newMajorCooldownManager(cooldowns *proto.Cooldowns) majorCooldownManager {
@@ -463,7 +461,6 @@ func (mcdm *majorCooldownManager) TryUseCooldowns(sim *Simulation) {
 		return
 	}
 
-	mcdm.tryUsing = true
 restart:
 	for _, mcd := range mcdm.majorCooldowns {
 		if !mcd.IsReady(sim) {
@@ -486,17 +483,12 @@ restart:
 			goto restart
 		}
 	}
-	mcdm.tryUsing = false
-
 	mcdm.minReady = mcdm.majorCooldowns[0].ReadyAt()
 }
 
 // This function should be called if the CD for a major cooldown changes outside
 // of the TryActivate() call.
 func (mcdm *majorCooldownManager) UpdateMajorCooldowns() {
-	if mcdm.tryUsing {
-		panic("Do not call UpdateMajorCooldowns while iterating cooldowns in TryUseCooldowns")
-	}
 	if len(mcdm.majorCooldowns) == 0 {
 		mcdm.minReady = NeverExpires
 		return
diff --git a/sim/rogue/rogue.go b/sim/rogue/rogue.go
index 9f4693a888..892d8cc96b 100644
--- a/sim/rogue/rogue.go
+++ b/sim/rogue/rogue.go
@@ -189,6 +189,7 @@ func (rogue *Rogue) Initialize() {
 	if !rogue.IsUsingAPL && rogue.Rotation.TricksOfTheTradeFrequency != proto.Rogue_Rotation_Never && !rogue.HasSetBonus(Tier10, 2) {
 		rogue.RegisterPrepullAction(-10*time.Second, func(sim *core.Simulation) {
 			rogue.TricksOfTheTrade.Cast(sim, nil)
+			rogue.UpdateMajorCooldowns()
 		})
 	}
 }
diff --git a/sim/rogue/tricks_of_the_trade.go b/sim/rogue/tricks_of_the_trade.go
index 7df533a486..60c87bb983 100644
--- a/sim/rogue/tricks_of_the_trade.go
+++ b/sim/rogue/tricks_of_the_trade.go
@@ -40,9 +40,11 @@ func (rogue *Rogue) registerTricksOfTheTradeSpell() {
 		},
 		OnGain: func(aura *core.Aura, sim *core.Simulation) {
 			rogue.TricksOfTheTrade.CD.Set(core.NeverExpires)
+			rogue.UpdateMajorCooldowns()
 		},
 		OnExpire: func(aura *core.Aura, sim *core.Simulation) {
 			rogue.TricksOfTheTrade.CD.Set(sim.CurrentTime + time.Second*time.Duration(30-5*rogue.Talents.FilthyTricks))
+			rogue.UpdateMajorCooldowns()
 		},
 	})
 
@@ -73,9 +75,8 @@ func (rogue *Rogue) registerTricksOfTheTradeSpell() {
 
 	if rogue.Rotation.TricksOfTheTradeFrequency != proto.Rogue_Rotation_Never {
 		// TODO: Support Rogue_Rotation_Once
-		tricksSpell := rogue.TricksOfTheTrade
 		rogue.AddMajorCooldown(core.MajorCooldown{
-			Spell:    tricksSpell,
+			Spell:    rogue.TricksOfTheTrade,
 			Priority: core.CooldownPriorityBloodlust,
 			Type:     core.CooldownTypeDPS,
 			ShouldActivate: func(sim *core.Simulation, character *core.Character) bool {