diff --git a/src/map/battle.cpp b/src/map/battle.cpp
index 9ddaab0da4..58367fc3ad 100644
--- a/src/map/battle.cpp
+++ b/src/map/battle.cpp
@@ -7246,7 +7246,7 @@ struct Damage battle_calc_magic_attack(struct block_list *src,struct block_list
 				}
 				break;
 			case NPC_DARKBREATH:
-				ad.damage = tstatus->hp * (skill_lv <= 5 ? 100 / (2 * 6 - skill_lv) : 50) / 100;
+				ad.damage = tstatus->hp * (skill_lv <= 5 ? 100 / (2 * (6 - skill_lv)) : 50) / 100;
 				break;
 			case PF_SOULBURN:
 				ad.damage = tstatus->sp * 2;