diff --git a/project/functions.js b/project/functions.js
index 4e4c0762..8ce11fa8 100644
--- a/project/functions.js
+++ b/project/functions.js
@@ -1205,7 +1205,7 @@ var functions_d6ad677b_427a_4623_b50f_a445a3b0ef8a =
 					var leftHp = core.status.hero.hp - (damage[x + "," + y] || 0);
 					if (leftHp > 1) {
 						// 上整/下整
-						var value = Math.floor((leftHp + (core.flags.betweenAttackCeil ? 0 : 1)) / 2);
+						var value = Math.floor((leftHp + (core.flags.betweenAttackCeil ? 1 : 0)) / 2);
 						damage[loc] = (damage[loc] || 0) + value;
 						type[loc] = "夹击伤害";
 					}