https://bugzilla.gnome.org/show_bug.cgi?id=668522
--- gio/gio-types.defs
+++ gio/gio-types.defs
@@ -526,7 +526,7 @@
   )
 )
 
-(define-enum MountMountFlags
+(define-flags MountMountFlags
   (in-module "gio")
   (c-name "GMountMountFlags")
   (gtype-id "G_TYPE_MOUNT_MOUNT_FLAGS")
@@ -545,7 +545,7 @@
   )
 )
 
-(define-enum DriveStartFlags
+(define-flags DriveStartFlags
   (in-module "gio")
   (c-name "GDriveStartFlags")
   (gtype-id "G_TYPE_DRIVE_START_FLAGS")
@@ -770,7 +770,7 @@
   )
 )
 
-(define-enum SocketMsgFlags
+(define-flags SocketMsgFlags
   (in-module "gio")
   (c-name "GSocketMsgFlags")
   (gtype-id "G_TYPE_SOCKET_MSG_FLAGS")
