diff --git a/src/server/scripts/Kalimdor/CavernsOfTime/BattleForMountHyjal/instance_hyjal.cpp b/src/server/scripts/Kalimdor/CavernsOfTime/BattleForMountHyjal/instance_hyjal.cpp
index 289d064c8..f27da4a41 100644
--- a/src/server/scripts/Kalimdor/CavernsOfTime/BattleForMountHyjal/instance_hyjal.cpp
+++ b/src/server/scripts/Kalimdor/CavernsOfTime/BattleForMountHyjal/instance_hyjal.cpp
@@ -419,6 +419,9 @@ public:
                         if (Creature* creature = instance->GetCreature(guid))
                             creature->DespawnOrUnsummon();
 
+                    if (_bossWave && (GetBossState(_bossWave) != DONE))
+                        SetBossState(_bossWave, NOT_STARTED);
+
                     _scheduler.Schedule(300s, [this](TaskContext)
                         {
                             for (ObjectGuid const& guid : _baseAlliance)
@@ -442,6 +445,9 @@ public:
                         if (Creature* creature = instance->GetCreature(guid))
                             creature->DespawnOrUnsummon();
 
+                    if (_bossWave && (GetBossState(_bossWave) != DONE))
+                        SetBossState(_bossWave, NOT_STARTED);
+
                     _scheduler.Schedule(300s, [this](TaskContext)
                         {
                             for (ObjectGuid const& guid : _baseHorde)