diff --git a/glib/giochannel.c b/glib/giochannel.c
index 6fec45f66..25baf42c9 100644
--- a/glib/giochannel.c
+++ b/glib/giochannel.c
@@ -946,6 +946,7 @@ g_io_channel_get_line_term (GIOChannel *channel,
  **/
 /**
  * GIOFlags:
+ * @G_IO_FLAG_NONE: no special flags set. Since: 2.74
  * @G_IO_FLAG_APPEND: turns on append mode, corresponds to %O_APPEND
  *     (see the documentation of the UNIX open() syscall)
  * @G_IO_FLAG_NONBLOCK: turns on nonblocking mode, corresponds to
diff --git a/glib/giochannel.h b/glib/giochannel.h
index 5a13449d5..dee3d7d05 100644
--- a/glib/giochannel.h
+++ b/glib/giochannel.h
@@ -85,6 +85,7 @@ typedef enum
 
 typedef enum
 {
+  G_IO_FLAG_NONE GLIB_AVAILABLE_ENUMERATOR_IN_2_74 = 0,
   G_IO_FLAG_APPEND = 1 << 0,
   G_IO_FLAG_NONBLOCK = 1 << 1,
   G_IO_FLAG_IS_READABLE = 1 << 2,	/* Read only flag */
diff --git a/glib/giounix.c b/glib/giounix.c
index b6345b6c6..067cecf9a 100644
--- a/glib/giounix.c
+++ b/glib/giounix.c
@@ -400,7 +400,7 @@ g_io_unix_set_flags (GIOChannel *channel,
 static GIOFlags
 g_io_unix_get_flags (GIOChannel *channel)
 {
-  GIOFlags flags = 0;
+  GIOFlags flags = G_IO_FLAG_NONE;
   glong fcntl_flags;
   GIOUnixChannel *unix_channel = (GIOUnixChannel *) channel;