diff --git a/specs/beacon-chain.md b/specs/beacon-chain.md
index fc8ab40c7..3adf2c7e0 100644
--- a/specs/beacon-chain.md
+++ b/specs/beacon-chain.md
@@ -474,7 +474,7 @@ def get_block_hash(active_state: ActiveState,
     return active_state.recent_block_hashes[slot - earliest_slot_in_array]
 ```
 
-`get_block_hash(_, _, s)` should always return the block in the beacon chain at slot `s`, and `get_shards_and_committees_for_slot(_, s)` should not change unless the validator set changes.
+`get_block_hash(_, _, s)` should always return the block hash in the beacon chain at slot `s`, and `get_shards_and_committees_for_slot(_, s)` should not change unless the validator set changes.
 
 We define another set of helpers to be used throughout: `bytes1(x): return x.to_bytes(1, 'big')`, `bytes2(x): return x.to_bytes(2, 'big')`, and so on for all integers, particularly 1, 2, 3, 4, 8, 32.