diff --git a/src/nex_tmpl.go b/src/nex_tmpl.go
index c7539eb..2891241 100644
--- a/src/nex_tmpl.go
+++ b/src/nex_tmpl.go
@@ -3,7 +3,7 @@ package fas_parser
 const Nex_tmpl = `#NEXUS
 BEGIN DATA;
 	DIMENSIONS NTAX={{ .Ntax }} NCHAR={{ .Nchar }};
-	FORMAT DATATYPE=DNA GAP=- MISSING=? ; #DATATYPE={}
+	FORMAT DATATYPE=DNA GAP=- MISSING=?;
 MATRIX
 {{- range $k, $v := .Matrix }}
 '{{ $k }}' {{ $v }}{{ end }}
@@ -17,4 +17,4 @@ END;
 `
 
 // 最后那个 $i 好像有问题
-// {{/* $k| printf "%-40s" */}}
\ No newline at end of file
+// {{/* $k| printf "%-40s" */}}