1 files changed, 1 insertions, 0 deletions
diff --git a/perliol.h b/perliol.h
index fa399e6f50..47fe6fc679 100644
--- a/perliol.h
+++ b/perliol.h
@@ -88,6 +88,7 @@ struct _PerlIO {
 #define PERLIO_F_OPEN		0x00200000
 #define PERLIO_F_FASTGETS	0x00400000
 #define PERLIO_F_TTY		0x00800000
+#define PERLIO_F_NOTREG         0x01000000   
 
 #define PerlIOBase(f)      (*(f))
 #define PerlIOSelf(f,type) ((type *)PerlIOBase(f))