diff --git a/specs/beacon-chain.md b/specs/beacon-chain.md
index a471b5e2e..6b27855ef 100644
--- a/specs/beacon-chain.md
+++ b/specs/beacon-chain.md
@@ -615,7 +615,7 @@ Additionally, verify and update the RANDAO reveal. This is done as follows:
 
 * Let `repeat_hash(x, n) = x if n == 0 else repeat_hash(hash(x), n-1)`.
 * Let `V = crystallized_state.validators[curblock_proposer_index]`.
-* Verify that `repeat_hash(block.randao_reveal, (current_slot - V.randao_last_reveal) // RANDAO_SLOTS_PER_LAYER + 1) == V.randao_commitment`, and set `active_state.randao_mix = xor(active_state.randao_mix, block.randao_reveal)` and append to `ActiveState.pending_specials` a `SpecialObject(kind=RANDAO_CHANGE, data=[bytes8(curblock_proposer_index), block.randao_reveal])`.
+* Verify that `repeat_hash(block.randao_reveal, (block.slot - V.randao_last_reveal) // RANDAO_SLOTS_PER_LAYER + 1) == V.randao_commitment`, and set `active_state.randao_mix = xor(active_state.randao_mix, block.randao_reveal)` and append to `ActiveState.pending_specials` a `SpecialObject(kind=RANDAO_CHANGE, data=[bytes8(curblock_proposer_index), block.randao_reveal])`.
 
 ### State recalculations (every `CYCLE_LENGTH` slots)