diff --git a/src/game/Object/SpellMgr.cpp b/src/game/Object/SpellMgr.cpp
index 8f696913..3338962e 100644
--- a/src/game/Object/SpellMgr.cpp
+++ b/src/game/Object/SpellMgr.cpp
@@ -848,6 +848,8 @@ bool IsPositiveEffect(SpellEntry const* spellproto, SpellEffectIndex effIndex)
                     switch (spellproto->EffectMiscValue[effIndex])
                     {
                         case SPELLMOD_COST:                 // dependent from bas point sign (negative -> positive)
+                        if(spellproto->Id == 12042)         // Arcane Power
+                                break;
                             if (spellproto->CalculateSimpleValue(effIndex) > 0)
                                 { return false; }
                             break;