1 files changed, 2 insertions, 1 deletions
diff --git a/src/big5.c b/src/big5.c
index ff0c51b..dbc750d 100644
--- a/src/big5.c
+++ b/src/big5.c
@@ -187,5 +187,6 @@ OnigEncodingType OnigEncodingBIG5 = {
   NULL, /* init */
   NULL, /* is_initialized */
   is_valid_mbc_string,
-  0, 0, 0
+  ENC_FLAG_ASCII_COMPATIBLE,
+  0, 0
 };