1 files changed, 1 insertions, 0 deletions
diff --git a/perliol.h b/perliol.h
index 449ea89983..d4604e2342 100644
--- a/perliol.h
+++ b/perliol.h
@@ -46,6 +46,7 @@ struct _PerlIO_funcs
 #define PERLIO_K_FASTGETS	0x00000008
 #define PERLIO_K_DUMMY		0x00000010
 #define PERLIO_K_UTF8		0x00008000
+#define PERLIO_K_DESTRUCT	0x00010000
 
 /*--------------------------------------------------------------------------------------*/
 struct _PerlIO