diff --git a/include/linux/ncp_fs.h b/include/linux/ncp_fs.h
index f69e66d..30b06c8 100644
--- a/include/linux/ncp_fs.h
+++ b/include/linux/ncp_fs.h
@@ -204,7 +204,7 @@
 /* linux/fs/ncpfs/dir.c */
 extern const struct inode_operations ncp_dir_inode_operations;
 extern const struct file_operations ncp_dir_operations;
-extern struct dentry_operations ncp_root_dentry_operations;
+extern const struct dentry_operations ncp_root_dentry_operations;
 int ncp_conn_logged_in(struct super_block *);
 int ncp_date_dos2unix(__le16 time, __le16 date);
 void ncp_date_unix2dos(int unix_date, __le16 * time, __le16 * date);