diff --git a/specs/phase1/beacon-chain.md b/specs/phase1/beacon-chain.md
index 66026d9a9..211c632a9 100644
--- a/specs/phase1/beacon-chain.md
+++ b/specs/phase1/beacon-chain.md
@@ -197,7 +197,7 @@ class PendingShardHeader(Container):
     # Length of the data in samples
     length: uint64
     # Who voted for the header
-    votes: Bitlist[MAX_COMMITTEE_SIZE]
+    votes: Bitlist[MAX_VALIDATORS_PER_COMMITTEE]
     # Has this header been confirmed?
     confirmed: bool
 ```