diff --git a/src/game/Unit.cpp b/src/game/Unit.cpp
index f0c3ed7fa..dcba26390 100644
--- a/src/game/Unit.cpp
+++ b/src/game/Unit.cpp
@@ -4849,6 +4849,16 @@ bool Unit::HasAura(uint32 spellId, SpellEffectIndex effIndex) const
     return false;
 }
 
+bool Unit::HasAuraOfDifficulty(uint32 spellId) const
+{
+    SpellEntry const* spellEntry = sSpellStore.LookupEntry(spellId);
+    if (spellEntry && spellEntry->SpellDifficultyId && IsInWorld() && GetMap()->IsDungeon())
+        if (SpellEntry const* spellDiffEntry = GetSpellEntryByDifficulty(spellEntry->SpellDifficultyId, GetMap()->GetDifficulty(), GetMap()->IsRaid()))
+            spellId = spellDiffEntry->Id;
+
+    return m_spellAuraHolders.find(spellId) != m_spellAuraHolders.end();
+}
+
 void Unit::AddDynObject(DynamicObject* dynObj)
 {
     m_dynObjGUIDs.push_back(dynObj->GetObjectGuid());
diff --git a/src/game/Unit.h b/src/game/Unit.h
index 570dba58c..855dd55c6 100644
--- a/src/game/Unit.h
+++ b/src/game/Unit.h
@@ -1421,6 +1421,7 @@ class MANGOS_DLL_SPEC Unit : public WorldObject
         {
             return m_spellAuraHolders.find(spellId) != m_spellAuraHolders.end();
         }
+        bool HasAuraOfDifficulty(uint32 spellId) const;
 
         bool virtual HasSpell(uint32 /*spellID*/) const { return false; }
 
diff --git a/src/shared/revision_nr.h b/src/shared/revision_nr.h
index a6ac0908a..11797474f 100644
--- a/src/shared/revision_nr.h
+++ b/src/shared/revision_nr.h
@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "11798"
+ #define REVISION_NR "11799"
 #endif // __REVISION_NR_H__