diff --git a/docs/x509/reference.rst b/docs/x509/reference.rst
index 279c4c7..7a41e1f 100644
--- a/docs/x509/reference.rst
+++ b/docs/x509/reference.rst
@@ -1713,7 +1713,7 @@
 
     .. attribute:: authority_cert_issuer
 
-        :type: :class:`Name` or None
+        :type: A list of :class:`GeneralName` instances or None
 
         The :class:`Name` of the issuer's issuer.