diff --git a/src/mkobj.c b/src/mkobj.c
index 4b2b51894..93f762c26 100644
--- a/src/mkobj.c
+++ b/src/mkobj.c
@@ -2459,7 +2459,8 @@ discard_minvent(struct monst *mtmp, boolean uncreate_artifacts)
 
 /*
  * Free obj from whatever list it is on in preparation for deleting it
- * or moving it elsewhere; obj->where will end up set to OBJ_FREE.
+ * or moving it elsewhere; obj->where will end up set to OBJ_FREE unless
+ * it is already OBJ_LUAFREE or OBJ_DELETED.
  * Doesn't handle unwearing of objects in hero's or monsters' inventories.
  *
  * Object positions:
@@ -2472,6 +2473,7 @@ discard_minvent(struct monst *mtmp, boolean uncreate_artifacts)
  *      OBJ_BURIED      level.buriedobjs chain
  *      OBJ_ONBILL      on gb.billobjs chain
  *      OBJ_LUAFREE     obj is dealloc'd from core, but still used by lua
+ *      OBJ_DELETED     obj has been deleted from play but not yet deallocated
  */
 void
 obj_extract_self(struct obj *obj)