diff --git a/specs/altair/validator.md b/specs/altair/validator.md
index 25897b97e..173a1e713 100644
--- a/specs/altair/validator.md
+++ b/specs/altair/validator.md
@@ -354,7 +354,7 @@ Set `contribution.subcommittee_index` to the index for the subcommittee index co
 
 Let `contribution.aggregation_bits` be a `Bitvector[SYNC_COMMITTEE_SIZE // SYNC_COMMITTEE_SUBNET_COUNT]`, where the `index`th bit is set in the `Bitvector` for each corresponding validator included in this aggregate from the corresponding subcommittee.
 An aggregator needs to find the index in the sync committee (as returned by `get_sync_committee_indices`) for a given validator referenced by `sync_committee_signature.validator_index` and map the sync committee index to an index in the subcommittee (along with the prior `subcommittee_index`). This index within the subcommittee is the one set in the `Bitvector`.
-For example, a validator with index `2044` could be at index `15` in the current sync committee. This sync committee index maps to `subcommittee_index` `1` with position `7` in the `Bitvector` for the contribution. 
+For example, a validator with index `2044` could be at index `135` in the current sync committee. This sync committee index maps to `subcommittee_index` `1` with position `7` in the `Bitvector` for the contribution. 
 Also note that a validator **could be included multiple times** in a given subcommittee such that multiple bits are set for a single `SyncCommitteeSignature`.
 
 ###### Signature
@@ -419,4 +419,4 @@ Some early sync committee rewards may be missed while the initial subnets form.
 * To join a sync committee subnet, select a random number of epochs before the end of the current sync committee period between 1 and `SYNC_COMMITTEE_SUBNET_COUNT`, inclusive. 
 Validators should join their member subnet at the beginning of the epoch they have randomly selected. 
 For example, if the next sync committee period starts at epoch `853,248` and the validator randomly selects an offset of `3`, they should join the subnet at the beginning of epoch `853,245`. 
-Validators should leverage the lookahead period on sync committee assignments so that they can join the appropriate subnets ahead of their assigned sync committee period.
\ No newline at end of file
+Validators should leverage the lookahead period on sync committee assignments so that they can join the appropriate subnets ahead of their assigned sync committee period.