diff --git a/docs/manifest-format.txt b/docs/manifest-format.txt
index c76df80..21f19db 100644
--- a/docs/manifest-format.txt
+++ b/docs/manifest-format.txt
@@ -38,6 +38,7 @@
     <!ELEMENT default (EMPTY)>
     <!ATTLIST default remote   IDREF #IMPLIED>
     <!ATTLIST default revision CDATA #IMPLIED>
+    <!ATTLIST default sync-j   CDATA #IMPLIED>
 
     <!ELEMENT manifest-server (EMPTY)>
     <!ATTLIST url              CDATA #REQUIRED>