diff --git a/fs/isofs/isofs.h b/fs/isofs/isofs.h
index b87ba06..e6308c8 100644
--- a/fs/isofs/isofs.h
+++ b/fs/isofs/isofs.h
@@ -176,5 +176,5 @@
 
 extern struct inode_operations isofs_dir_inode_operations;
 extern const struct file_operations isofs_dir_operations;
-extern struct address_space_operations isofs_symlink_aops;
+extern const struct address_space_operations isofs_symlink_aops;
 extern struct export_operations isofs_export_ops;