1 files changed, 3 insertions, 0 deletions
diff --git a/re.h b/re.h
index dc4cd17354..9d3b77f519 100644
--- a/re.h
+++ b/re.h
@@ -36,4 +36,7 @@ VALUE rb_reg_regsub _((VALUE, VALUE, struct re_registers *));
 int rb_kcode _((void));
 
 extern int ruby_ignorecase;
+
+int rb_mbclen2 _((unsigned char, VALUE));
+#define mbclen2(c,re) rb_mbclen2((c),(re))
 #endif