diff --git a/pytato/array.py b/pytato/array.py
index 755a9e3405ca682ab0a2e12260a7e1a4d0d63feb..4382ad770cb416e96a08cf246149500d706e05f7 100644
--- a/pytato/array.py
+++ b/pytato/array.py
@@ -1128,7 +1128,7 @@ class Slice(IndexRemappingBase):
     .. attribute:: begin
     .. attribute:: size
     """
-    fields = Array.fields + ("begin", "size")
+    fields = IndexRemappingBase.fields + ("begin", "size")
     mapper_method = "map_slice"
 
     def __init__(self,