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-rw-r--r--ext/nkf/nkf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/nkf/nkf.c b/ext/nkf/nkf.c
index ba8ffc9..c11a042 100644
--- a/ext/nkf/nkf.c
+++ b/ext/nkf/nkf.c
@@ -80,7 +80,7 @@ rb_encoding* rb_nkf_enc_get(const char *name)
int nkf_split_options(const char *arg)
{
int count = 0;
- char option[256];
+ unsigned char option[256];
int i = 0, j = 0;
int is_escaped = FALSE;
int is_single_quoted = FALSE;