2 files changed, 6 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 65e7899efb..394a79901d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Oct 11 22:08:24 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (prep_io): fix typo of struct member name.
+	  [ruby-core:77550] [Bug #12829]
+
 Tue Oct 11 16:45:24 2016  Tanaka Akira  <akr@fsij.org>
 
 	* lib/uri/generic.rb (URI.find_proxy): Add an optional argument, env.
diff --git a/io.c b/io.c
index 17ec6baa81..35f6fb699b 100644
--- a/io.c
+++ b/io.c
@@ -7375,7 +7375,7 @@ prep_io(int fd, int fmode, VALUE klass, const char *path)
     fp->mode = fmode;
     if (!io_check_tty(fp)) {
 #ifdef __CYGWIN__
-	fp->fmode |= FMODE_BINMODE;
+	fp->mode |= FMODE_BINMODE;
 	setmode(fd, O_BINARY);
 #endif
     }