diff --git a/src/server/game/Maps/Map.cpp b/src/server/game/Maps/Map.cpp
index 307dd3241..14b2a512f 100644
--- a/src/server/game/Maps/Map.cpp
+++ b/src/server/game/Maps/Map.cpp
@@ -3090,6 +3090,7 @@ void Map::UpdateEncounterState(EncounterCreditType type, uint32 creditEntry, Uni
         return;
 
     uint32 dungeonId = 0;
+    bool updated = false;
 
     for (DungeonEncounterList::const_iterator itr = encounters->begin(); itr != encounters->end(); ++itr)
     {
@@ -3097,8 +3098,12 @@ void Map::UpdateEncounterState(EncounterCreditType type, uint32 creditEntry, Uni
         if (encounter->creditType == type && encounter->creditEntry == creditEntry)
         {
             if (source)
-                if (InstanceScript* instanceScript = source->GetInstanceScript())
+                if (InstanceScript* instanceScript = source->GetInstanceScript()) {
+                    uint32 prevMask = instanceScript->GetCompletedEncounterMask();
                     instanceScript->SetCompletedEncountersMask((1 << encounter->dbcEntry->encounterIndex)|instanceScript->GetCompletedEncounterMask(), true);
+                    if (prevMask != instanceScript->GetCompletedEncounterMask())
+                        updated = true;
+                }
 
             if (encounter->lastEncounterDungeon)
             {
@@ -3111,7 +3116,7 @@ void Map::UpdateEncounterState(EncounterCreditType type, uint32 creditEntry, Uni
     // pussywizard:
     LogEncounterFinished(type, creditEntry);
     
-    sScriptMgr->OnAfterUpdateEncounterState(this, type, creditEntry, source, difficulty_fixed, encounters, dungeonId);
+    sScriptMgr->OnAfterUpdateEncounterState(this, type, creditEntry, source, difficulty_fixed, encounters, dungeonId, updated);
 
     if (dungeonId)
     {
diff --git a/src/server/game/Scripting/ScriptMgr.cpp b/src/server/game/Scripting/ScriptMgr.cpp
index 99334542d..1925138ab 100644
--- a/src/server/game/Scripting/ScriptMgr.cpp
+++ b/src/server/game/Scripting/ScriptMgr.cpp
@@ -1539,9 +1539,9 @@ void ScriptMgr::OnAfterInitializeLockedDungeons(Player* player)
     FOREACH_SCRIPT(GlobalScript)->OnAfterInitializeLockedDungeons(player);
 }
 
-void ScriptMgr::OnAfterUpdateEncounterState(Map* map, EncounterCreditType type, uint32 creditEntry, Unit* source, Difficulty difficulty_fixed, DungeonEncounterList const* encounters, uint32 dungeonCompleted) 
+void ScriptMgr::OnAfterUpdateEncounterState(Map* map, EncounterCreditType type, uint32 creditEntry, Unit* source, Difficulty difficulty_fixed, DungeonEncounterList const* encounters, uint32 dungeonCompleted, bool updated) 
 {
-    FOREACH_SCRIPT(GlobalScript)->OnAfterUpdateEncounterState(map, type, creditEntry, source, difficulty_fixed, encounters, dungeonCompleted);
+    FOREACH_SCRIPT(GlobalScript)->OnAfterUpdateEncounterState(map, type, creditEntry, source, difficulty_fixed, encounters, dungeonCompleted, updated);
 }
 
 uint32 ScriptMgr::DealDamage(Unit* AttackerUnit, Unit *pVictim, uint32 damage, DamageEffectType damagetype)
diff --git a/src/server/game/Scripting/ScriptMgr.h b/src/server/game/Scripting/ScriptMgr.h
index efa4efba9..067beef92 100644
--- a/src/server/game/Scripting/ScriptMgr.h
+++ b/src/server/game/Scripting/ScriptMgr.h
@@ -1017,7 +1017,7 @@ class GlobalScript : public ScriptObject
         virtual void OnBeforeUpdateArenaPoints(ArenaTeam* /*at*/, std::map<uint32, uint32> & /*ap*/) { }
         
         // Called when a dungeon encounter is updated.
-        virtual void OnAfterUpdateEncounterState(Map* /*map*/, EncounterCreditType /*type*/,  uint32 /*creditEntry*/, Unit* /*source*/, Difficulty /*difficulty_fixed*/, DungeonEncounterList const* /*encounters*/, uint32 /*dungeonCompleted*/) { }
+        virtual void OnAfterUpdateEncounterState(Map* /*map*/, EncounterCreditType /*type*/,  uint32 /*creditEntry*/, Unit* /*source*/, Difficulty /*difficulty_fixed*/, DungeonEncounterList const* /*encounters*/, uint32 /*dungeonCompleted*/, bool /*updated*/) { }
 };
 
 // this class can be used to be extended by Modules
@@ -1296,7 +1296,7 @@ class ScriptMgr
         void OnItemRoll(Player const* player, LootStoreItem const* LootStoreItem, float &chance, Loot& loot, LootStore const& store);
         void OnInitializeLockedDungeons(Player* player, uint8& level, uint32& lockData);
         void OnAfterInitializeLockedDungeons(Player* player);
-        void OnAfterUpdateEncounterState(Map* map, EncounterCreditType type, uint32 creditEntry, Unit* source, Difficulty difficulty_fixed, DungeonEncounterList const* encounters, uint32 dungeonCompleted);
+        void OnAfterUpdateEncounterState(Map* map, EncounterCreditType type, uint32 creditEntry, Unit* source, Difficulty difficulty_fixed, DungeonEncounterList const* encounters, uint32 dungeonCompleted, bool updated);
 
 
     public: /* Scheduled scripts */