diff --git a/specs/altair/validator.md b/specs/altair/validator.md
index 49146da00..8742900bc 100644
--- a/specs/altair/validator.md
+++ b/specs/altair/validator.md
@@ -73,7 +73,7 @@ This document is currently illustrative for early Altair testnets and some parts
 
 | Name | Value | Unit |
 | - | - | :-: |
-| `TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE` | `2**2` (= 4) | validators |
+| `TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE` | `2**4` (= 16) | validators |
 | `SYNC_COMMITTEE_SUBNET_COUNT` | `4` | The number of sync committee subnets used in the gossipsub aggregation protocol. |
 
 ## Containers