diff --git a/document_page_reference/models/document_page.py b/document_page_reference/models/document_page.py
index 3c5460bc..fd74a025 100644
--- a/document_page_reference/models/document_page.py
+++ b/document_page_reference/models/document_page.py
@@ -21,8 +21,8 @@ try:
     name_re = re.compile("^%s$" % old_name_re.pattern)
 
     class Context(SandboxedEnvironment.context_class):
-        def resolve(self, key):
-            res = super().resolve(key)
+        def resolve_or_missing(self, key):
+            res = super().resolve_or_missing(key)
             if not isinstance(res, Undefined):
                 return res
             return self.parent["ref"](key)