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-rw-r--r--perl.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/perl.h b/perl.h
index 6104c63563..61856e1843 100644
--- a/perl.h
+++ b/perl.h
@@ -4369,7 +4369,8 @@ enum { /* pass one of these to get_vtbl */
#define HINT_NEW_STRING 0x00008000
#define HINT_NEW_RE 0x00010000
#define HINT_LOCALIZE_HH 0x00020000 /* %^H needs to be copied */
-#define HINT_LEXICAL_IO 0x00040000 /* ${^OPEN} is set */
+#define HINT_LEXICAL_IO_IN 0x00040000 /* ${^OPEN} is set for input */
+#define HINT_LEXICAL_IO_OUT 0x00080000 /* ${^OPEN} is set for output */
#define HINT_RE_TAINT 0x00100000 /* re pragma */
#define HINT_RE_EVAL 0x00200000 /* re pragma */