diff --git a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_scourgelord_tyrannus.cpp b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_scourgelord_tyrannus.cpp
index 675ff39f1..b0de4aba5 100644
--- a/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_scourgelord_tyrannus.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/PitOfSaron/boss_scourgelord_tyrannus.cpp
@@ -97,6 +97,7 @@ public:
                     if (Vehicle* v = c->GetVehicleKit())
                         v->InstallAllAccessories(false);
                 }
+                pInstance->SetData(DATA_TYRANNUS, NOT_STARTED);
             }
         }