diff --git a/book/src/dev/rfcs/0005-state-updates.md b/book/src/dev/rfcs/0005-state-updates.md
index 7971cb54..3d634ab3 100644
--- a/book/src/dev/rfcs/0005-state-updates.md
+++ b/book/src/dev/rfcs/0005-state-updates.md
@@ -404,7 +404,7 @@ chain and updates all side chains to match.
 3. Remove the lowest height block from the best chain with
    `let finalized_block = best_chain.pop_root();`
 
-4. Add `best_chain` back to `self.chain_set` if it is not empty
+4. Add `best_chain` back to `self.chain_set` if `best_chain` is not empty
 
 5. For each remaining `chain` in `side_chains`
     - remove the lowest height block from `chain`