diff --git a/fs/libfs.c b/fs/libfs.c
index 503898d..0f4ee02 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -186,7 +186,7 @@
 	.fsync		= simple_sync_file,
 };
 
-struct inode_operations simple_dir_inode_operations = {
+const struct inode_operations simple_dir_inode_operations = {
 	.lookup		= simple_lookup,
 };