diff --git a/docs/develop/data-formats/cell-boc.mdx b/docs/develop/data-formats/cell-boc.mdx
index 1544623d3e..a085ca62a7 100644
--- a/docs/develop/data-formats/cell-boc.mdx
+++ b/docs/develop/data-formats/cell-boc.mdx
@@ -112,7 +112,7 @@ Now let's add the refs indexes:
 And put it all together:
 ```json
 0201 C0     0201  
-0101 AA     02
+0101 FF     02
 0006 0AAAAA 
 ```