diff --git a/specs/validator/0_beacon-chain-validator.md b/specs/validator/0_beacon-chain-validator.md
index 302deeae1..9e4fa7960 100644
--- a/specs/validator/0_beacon-chain-validator.md
+++ b/specs/validator/0_beacon-chain-validator.md
@@ -148,7 +148,7 @@ def get_committee_assignment(
 
     committees_per_slot = get_epoch_committee_count(state, epoch) // SLOTS_PER_EPOCH
     epoch_start_slot = get_epoch_start_slot(epoch)
-    for slot in range(epoch_start_slot, epoch_start_slot + SLOTS_PER_EPOCH)
+    for slot in range(epoch_start_slot, epoch_start_slot + SLOTS_PER_EPOCH):
         slot_start_shard = get_epoch_start_shard(state, epoch) + committees_per_slot * (slot % SLOTS_PER_EPOCH)
         for i in range(committees_per_slot):
             shard = (slot_start_shard + i) % SHARD_COUNT