diff --git a/src/server/game/AI/SmartScripts/SmartScript.cpp b/src/server/game/AI/SmartScripts/SmartScript.cpp
index 58f1f33a4..69da11bac 100644
--- a/src/server/game/AI/SmartScripts/SmartScript.cpp
+++ b/src/server/game/AI/SmartScripts/SmartScript.cpp
@@ -4059,6 +4059,13 @@ void SmartScript::UpdateTimer(SmartScriptHolder& e, uint32 const diff)
             }
         }
 
+        // Delay flee for assist event if casting
+        if (e.GetActionType() == SMART_ACTION_FLEE_FOR_ASSIST && me && me->HasUnitState(UNIT_STATE_CASTING))
+        {
+            e.timer = 1;
+            return;
+        }
+
         e.active = true;//activate events with cooldown
         switch (e.GetEventType())//process ONLY timed events
         {