diff --git a/aplK.py b/aplK.py
index 4990482..8de1933 100644
--- a/aplK.py
+++ b/aplK.py
@@ -327,7 +327,7 @@ class SimplicialAplN(AplN, UniqueRepresentation):
         """
         Element class of the simplicial commutative differential algebra (Apl)n.
         """
-
+        @cached_method
         def face_morphism(self,i):
             """"