diff --git a/fs/ntfs/ntfs.h b/fs/ntfs/ntfs.h
index d73f5a9..d6a340bf 100644
--- a/fs/ntfs/ntfs.h
+++ b/fs/ntfs/ntfs.h
@@ -69,7 +69,7 @@
 extern const struct  file_operations ntfs_empty_file_ops;
 extern const struct inode_operations ntfs_empty_inode_ops;
 
-extern struct export_operations ntfs_export_ops;
+extern const struct export_operations ntfs_export_ops;
 
 /**
  * NTFS_SB - return the ntfs volume given a vfs super block