diff --git a/fs/adfs/adfs.h b/fs/adfs/adfs.h
index 8311575..e0a85db 100644
--- a/fs/adfs/adfs.h
+++ b/fs/adfs/adfs.h
@@ -86,7 +86,7 @@
 /* dir_*.c */
 extern const struct inode_operations adfs_dir_inode_operations;
 extern const struct file_operations adfs_dir_operations;
-extern struct dentry_operations adfs_dentry_operations;
+extern const struct dentry_operations adfs_dentry_operations;
 extern struct adfs_dir_ops adfs_f_dir_ops;
 extern struct adfs_dir_ops adfs_fplus_dir_ops;
 
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index 85a30e9..e867ccf 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -263,7 +263,7 @@
 	return 0;
 }
 
-struct dentry_operations adfs_dentry_operations = {
+const struct dentry_operations adfs_dentry_operations = {
 	.d_hash		= adfs_hash,
 	.d_compare	= adfs_compare,
 };