diff --git a/doc/src/sgml/trigger.sgml b/doc/src/sgml/trigger.sgml
index 04e702a795..6e1f370b21 100644
--- a/doc/src/sgml/trigger.sgml
+++ b/doc/src/sgml/trigger.sgml
@@ -721,6 +721,7 @@ typedef struct Trigger
     int16       tgtype;
     char        tgenabled;
     bool        tgisinternal;
+    bool        tgisclone;
     Oid         tgconstrrelid;
     Oid         tgconstrindid;
     Oid         tgconstraint;