diff --git a/nkf.c b/nkf.c
index 5209864..1fb5f79 100644
--- a/nkf.c
+++ b/nkf.c
@@ -5491,7 +5491,7 @@ kanji_convert(FILE *f)
code_status(c1);
if (c2) {
/* second byte */
- if (c2 > DEL) {
+ if (c2 > ((input_encoding && nkf_enc_cp5022x_p(input_encoding)) ? 0x92 : DEL)) {
/* in case of 8th bit is on */
if (!estab_f&&!mime_decode_mode) {
/* in case of not established yet */