diff --git a/src/zap.c b/src/zap.c
index 11f27dffc..44cb174b4 100644
--- a/src/zap.c
+++ b/src/zap.c
@@ -3693,6 +3693,8 @@ register struct obj *obj;		   /* no texts here! */
 	obj->onamelth = 0;		/* no names */
 	obj->oxlth = 0;			/* no extra data */
 	obj->oattached = OATTACHED_NOTHING;
+	obj_extract_self(obj);		/* move rocks back on top */
+	place_object(obj, obj->ox, obj->oy);
 	if(!does_block(obj->ox,obj->oy,&levl[obj->ox][obj->oy]))
 	    unblock_point(obj->ox,obj->oy);
 	if(cansee(obj->ox,obj->oy))