1 files changed, 0 insertions, 4 deletions
diff --git a/io.c b/io.c
index 925bfd4ea0..154a01943b 100644
--- a/io.c
+++ b/io.c
@@ -10573,10 +10573,6 @@ Init_IO(void)
     /*  Try to minimize cache effects of the I/O to and from this file. */
     rb_file_const("DIRECT", INT2FIX(O_DIRECT));
 #endif
-#ifdef O_CLOEXEC
-    /* enable close-on-exec flag */
-    rb_file_const("CLOEXEC", INT2FIX(O_CLOEXEC)); /* Linux, POSIX-2008. */
-#endif
 
     sym_mode = ID2SYM(rb_intern("mode"));
     sym_perm = ID2SYM(rb_intern("perm"));