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-rw-r--r--include/ruby/oniguruma.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/oniguruma.h b/include/ruby/oniguruma.h
index 2674b010e7..67773aa482 100644
--- a/include/ruby/oniguruma.h
+++ b/include/ruby/oniguruma.h
@@ -204,7 +204,7 @@ ONIG_EXTERN OnigEncodingType OnigEncodingASCII;
#define ONIGENC_CTYPE_ALNUM 13 /* alpha || digit */
#define ONIGENC_CTYPE_ASCII 14
#define ONIGENC_MAX_STD_CTYPE ONIGENC_CTYPE_ASCII
-#define ONIGENC_CTYPE_SPECIAL_MASK 128
+#define ONIGENC_CTYPE_SPECIAL_MASK 256
#define ONIGENC_CTYPE_S /* [\t\n\v\f\r\s] */ \
ONIGENC_CTYPE_SPECIAL_MASK | ONIGENC_CTYPE_SPACE
#define ONIGENC_CTYPE_D /* [0-9] */ \