diff --git a/as_covers/as_cover_class.sage b/as_covers/as_cover_class.sage
index 4b2ed95..95a94d1 100644
--- a/as_covers/as_cover_class.sage
+++ b/as_covers/as_cover_class.sage
@@ -342,7 +342,7 @@ class as_cover:
         G = self.group
         H = self.stabilizer(place = place)
         for g in self.group.elts:
-            if g != AS.group.one:
+            if g != self.group.one:
                 flag = 1
                 for v in result:
                     if (G.elt(g)*(-G.elt(v))).as_tuple in H: