diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index 9c6f88540e3..de1ece17c0c 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -9611,7 +9611,7 @@ dumpDomain(Archive *fout, TypeInfo *tyinfo)
 		appendPQExpBuffer(labelq, "CONSTRAINT %s ",
 						  fmtId(domcheck->dobj.name));
 		appendPQExpBuffer(labelq, "ON DOMAIN %s",
-						  fmtId(qtypname));
+						  qtypname);
 		dumpComment(fout, labelq->data,
 					tyinfo->dobj.namespace->dobj.name,
 					tyinfo->rolname,