diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 1dc8438..7db2d28 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -188,9 +188,9 @@
 
 /* jump tables */
 
-extern struct inode_operations	 affs_file_inode_operations;
-extern struct inode_operations	 affs_dir_inode_operations;
-extern struct inode_operations   affs_symlink_inode_operations;
+extern const struct inode_operations	 affs_file_inode_operations;
+extern const struct inode_operations	 affs_dir_inode_operations;
+extern const struct inode_operations   affs_symlink_inode_operations;
 extern const struct file_operations	 affs_file_operations;
 extern const struct file_operations	 affs_file_operations_ofs;
 extern const struct file_operations	 affs_dir_operations;