diff --git a/iwanami/068/027/016.txt b/iwanami/068/027/016.txt
index 0dc235fc69bc96a0f3e4ad156ed4e8ca0561e709..5abc8563a991db216ed896bfbfa20087590f158d 100644
--- a/iwanami/068/027/016.txt
+++ b/iwanami/068/027/016.txt
@@ -6,7 +6,7 @@
 5	月	月	NOUN	n,名詞,時,*	Case=Tem	4	clf	_	Gloss=month|SpaceAfter=No
 6	乙酉	乙酉	NUM	n,数詞,干支,*	NumType=Ord	4	conj	_	Gloss=[22nd-sexagenary]|SpaceAfter=No
 7	朔	朔	NOUN	n,名詞,時,*	Case=Tem	4	conj	_	Gloss=first-day-of-the-new-moon|SpaceAfter=No
-8	丙戌	丙戌	NUM	n,数詞,干支,*	NumType=Ord	7	obj	_	Gloss=[23rd-sexagenary]|SpaceAfter=No
+8	丙戌	丙戌	NUM	n,数詞,干支,*	NumType=Ord	7	flat	_	Gloss=[23rd-sexagenary]|SpaceAfter=No
 9	百濟	百濟	PROPN	n,名詞,主体,国名	Case=Loc|NameType=Nat	10	nsubj	_	Gloss=[country-name]|SpaceAfter=No
 10	遣	遣	VERB	v,動詞,行為,使役	_	0	root	_	Gloss=send|SpaceAfter=No
 11	達率	達率	NOUN	n,名詞,人,役割	NameType=Giv	10	obj	_	SpaceAfter=No