1 files changed, 4 insertions, 0 deletions
diff --git a/enc/euc_tw.c b/enc/euc_tw.c
index 1c5659cb1d..722e29a9da 100644
--- a/enc/euc_tw.c
+++ b/enc/euc_tw.c
@@ -221,7 +221,11 @@ OnigEncodingDefine(euc_tw, EUC_TW) = {
   onigenc_not_support_get_ctype_code_range,
   euctw_left_adjust_char_head,
   euctw_is_allowed_reverse_match,
+#ifdef USE_CASE_MAP_API
   onigenc_ascii_only_case_map,
+#else
+  NULL,
+#endif
   0,
   ONIGENC_FLAG_NONE,
 };