diff --git a/src/server/game/Entities/Unit/Unit.cpp b/src/server/game/Entities/Unit/Unit.cpp
index b95b31962..c7964a1ff 100644
--- a/src/server/game/Entities/Unit/Unit.cpp
+++ b/src/server/game/Entities/Unit/Unit.cpp
@@ -11255,12 +11255,12 @@ void Unit::SendEnergizeSpellLog(Unit* victim, uint32 spellID, uint32 damage, Pow
 
 void Unit::EnergizeBySpell(Unit* victim, uint32 spellID, uint32 damage, Powers powerType)
 {
-    victim->ModifyPower(powerType, damage, false);
+    int32 gainedPower = victim->ModifyPower(powerType, damage, false);
 
-    if (powerType != POWER_HAPPINESS)
+    if (powerType != POWER_HAPPINESS && gainedPower)
     {
         SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(spellID);
-        victim->getHostileRefMgr().threatAssist(this, float(damage) * 0.5f, spellInfo);
+        victim->getHostileRefMgr().threatAssist(this, float(gainedPower) * 0.5f, spellInfo);
     }
 
     SendEnergizeSpellLog(victim, spellID, damage, powerType);