diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index cd80499a0..4c785ab16 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -865,7 +865,7 @@ Verify that there are at most `MAX_ATTESTATION_COUNT` `AttestationRecord` object
 For each `AttestationRecord` object `obj`:
 
 * Verify that `obj.data.slot <= block.slot - MIN_ATTESTATION_INCLUSION_DELAY` and `obj.data.slot >= max(parent.slot - CYCLE_LENGTH + 1, 0)`.
-* Verify that `obj.data.justified_slot` is equal to `justification_source if state.last_state_recalculation_slot else prev_cycle_justification_source`
+* Verify that `obj.data.justified_slot` is equal to `justification_source if obj.data.slot >= state.last_state_recalculation_slot else prev_cycle_justification_source`
 * Verify that `obj.data.justified_block_hash` is the hash of the block in the current chain at the slot -- `obj.data.justified_slot`.
 * Verify that either `obj.data.last_crosslink_hash` or `obj.data.shard_block_hash` equals `state.crosslinks[shard].shard_block_hash`.
 * `aggregate_sig` verification: