diff --git a/src/anchor_in_depth/PDAs.md b/src/anchor_in_depth/PDAs.md
index 1eaf959..d19efbc 100644
--- a/src/anchor_in_depth/PDAs.md
+++ b/src/anchor_in_depth/PDAs.md
@@ -271,7 +271,8 @@ mod puppet_master {
         puppet::cpi::set_data(
             ctx.accounts.set_data_ctx().with_signer(&[&[bump][..]]),
             data,
-        )
+        )?;
+        Ok(())
     }
 }