diff --git a/landlock.cpp b/landlock.cpp
index 3ffc46bc..e519b0df 100644
--- a/landlock.cpp
+++ b/landlock.cpp
@@ -252,7 +252,10 @@ EX void countHyperstoneQuest(int& i1, int& i2) {
   i1 = 0; i2 = 0;
   generateLandList(isLandIngame);
   for(eLand l: landlist) {
+    // no treasure
     if(l == laCA) continue;
+    // same treasure, so count only once
+    if(l == laMirrorOld && isLandIngame(laMirror)) continue;
     eItem ttype = treasureType(l);
     if(!required_for_hyperstones(ttype)) continue;
     i2++; if(items[ttype] >= R10) i1++;