diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 0592919e4..ba22c716b 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -55,6 +55,7 @@
     - [Helper functions](#helper-functions)
         - [`hash`](#hash)
         - [`hash_tree_root`](#hash_tree_root)
+        - [`signed_root`](#signed_root)
         - [`slot_to_epoch`](#slot_to_epoch)
         - [`get_previous_epoch`](#get_previous_epoch)
         - [`get_current_epoch`](#get_current_epoch)
@@ -968,7 +969,7 @@ def generate_seed(state: BeaconState,
 ```python
 def get_beacon_proposer_index(state: BeaconState,
                               slot: Slot,
-                              registry_change: bool=False)) -> ValidatorIndex:
+                              registry_change: bool=False) -> ValidatorIndex:
     """
     Return the beacon proposer index for the ``slot``.
     """
diff --git a/specs/validator/0_beacon-chain-validator.md b/specs/validator/0_beacon-chain-validator.md
index 949a5e429..e1083c5c5 100644
--- a/specs/validator/0_beacon-chain-validator.md
+++ b/specs/validator/0_beacon-chain-validator.md
@@ -50,7 +50,7 @@ __NOTICE__: This document is a work-in-progress for researchers and implementers
                 - [Aggregation bitfield](#aggregation-bitfield)
                 - [Custody bitfield](#custody-bitfield)
                 - [Aggregate signature](#aggregate-signature)
-    - [Validator assigments](#validator-assignments)
+    - [Validator assignments](#validator-assignments)
         - [Lookahead](#lookahead)
     - [How to avoid slashing](#how-to-avoid-slashing)
         - [Proposer slashing](#proposer-slashing)
@@ -371,7 +371,7 @@ def get_committee_assignment(
         if len(selected_committees) > 0:
             validators = selected_committees[0][0]
             shard = selected_committees[0][1]
-            is_proposer = validator_index == get_beacon_proposer_index(state, slot, registry_change)
+            is_proposer = validator_index == get_beacon_proposer_index(state, slot, registry_change=registry_change)
 
             assignment = (validators, shard, slot, is_proposer)
             return assignment