diff --git a/libs/ui.js b/libs/ui.js
index b5e02741..d5f269d5 100644
--- a/libs/ui.js
+++ b/libs/ui.js
@@ -1395,7 +1395,7 @@ ui.prototype.drawBook = function (index) {
 
 ////// 绘制怪物属性的详细信息 //////
 ui.prototype.drawBookDetail = function (index) {
-    var enemys = core.enemys.getCurrentEnemys(core.floorIds[core.status.event.selection]);
+    var enemys = core.enemys.getCurrentEnemys(core.floorIds[(core.status.event.selection||{}).index]);
     if (enemys.length==0) return;
     if (index<0) index=0;
     if (index>=enemys.length) index=enemys.length-1;