diff --git a/src/server/game/Entities/Unit/Unit.cpp b/src/server/game/Entities/Unit/Unit.cpp
index 5dff61326cfb0..2003be91c7cb9 100644
--- a/src/server/game/Entities/Unit/Unit.cpp
+++ b/src/server/game/Entities/Unit/Unit.cpp
@@ -9015,7 +9015,21 @@ bool Unit::ApplyDiminishingToDuration(SpellInfo const* auraSpellInfo, bool trigg
         }
     }
 
+    /* @tswow-begin */
+    int32 oldDuration = duration;
+    uint8 level = previousLevel;
     duration = int32(duration * mod);
+
+    FIRE(Unit,OnApplyDiminishingReturn
+        , TSUnit(const_cast<Unit*>(this))
+        , TSSpellInfo(auraSpellInfo)
+        , TSMutable<int32>(&duration)
+        , oldDuration
+        , level
+        , mod
+    );
+    /* @tswow-end */
+
     return (duration != 0);
 }