diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 18173c1ab..f1d1638c4 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -599,7 +599,7 @@ def deposit(deposit_params: bytes[2048]):
     if self.total_deposit_count == 16384:
         timestamp_day_boundary: timestamp = (block.timestamp - block.timestamp % 86400) + 86400
         timestamp_day_boundary_bytes8: bytes[8] = slice(convert(timestamp_day_boundary, 'bytes32'), 24, 8)
-        log.ChainStart(self.receipt_tree[1], timestamp_day_boundary_bytes8 )
+        log.ChainStart(self.receipt_tree[1], timestamp_day_boundary_bytes8)
 
 @public
 @constant