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-rw-r--r--enc/unicode.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/enc/unicode.c b/enc/unicode.c
index beb5fa39f0..e7eb7b3902 100644
--- a/enc/unicode.c
+++ b/enc/unicode.c
@@ -2080,7 +2080,7 @@ onigenc_utf16_32_get_ctype_code_range(OnigCtype ctype, OnigCodePoint* sb_out,
#include "ruby/st.h"
-#define PROPERTY_NAME_MAX_SIZE MAX_WORD_LENGTH
+#define PROPERTY_NAME_MAX_SIZE MAX_WORD_LENGTH+1
extern int
onigenc_unicode_property_name_to_ctype(OnigEncoding enc, UChar* name, UChar* end)