1 files changed, 1 insertions, 0 deletions
diff --git a/perl.h b/perl.h
index cccf728439..77ef4c9817 100644
--- a/perl.h
+++ b/perl.h
@@ -2698,6 +2698,7 @@ enum {		/* pass one of these to get_vtbl */
 
 #define HINT_FILETEST_ACCESS	0x00400000
 #define HINT_UTF8		0x00800000
+#define HINT_UTF8_DISTINCT	0x01000000
 
 /* Various states of an input record separator SV (rs, nrs) */
 #define RsSNARF(sv)   (! SvOK(sv))