diff --git a/src/d/actor/d_a_npc_ykm.cpp b/src/d/actor/d_a_npc_ykm.cpp
index 1cdba0d9a5..d95157c890 100644
--- a/src/d/actor/d_a_npc_ykm.cpp
+++ b/src/d/actor/d_a_npc_ykm.cpp
@@ -947,6 +947,9 @@ BOOL daNpc_ykM_c::isDelete() {
             return FALSE;
 
         case TYPE_COOK:
+#if TARGET_PC
+            if (randomizer_IsActive()) return false; // We don't want cooking Yeto to leave the dungeon, even if the BK is obtained.
+#endif
             return dComIfGs_isDungeonItemBossKey();
 
         case TYPE_2:
diff --git a/src/d/actor/d_a_npc_ykw.cpp b/src/d/actor/d_a_npc_ykw.cpp
index e2c97df58a..267038fdf7 100644
--- a/src/d/actor/d_a_npc_ykw.cpp
+++ b/src/d/actor/d_a_npc_ykw.cpp
@@ -573,6 +573,9 @@ int daNpc_ykW_c::isDelete() {
     case 0:
         return 0;
     case 1:
+#if TARGET_PC
+        if (randomizer_IsActive()) return false;// We don't want Yeta to leave the dungeon, even if the BK is obtained.
+#endif
         return dComIfGs_isDungeonItemBossKey();
     case 2:
         return !dComIfGs_isDungeonItemBossKey() ||