diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 05bb37f48..7d26c06f9 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -876,18 +876,21 @@ def get_crosslink_committees_at_slot(state: BeaconState,
         shuffling_epoch = state.previous_shuffling_epoch
         shuffling_start_shard = state.previous_shuffling_start_shard
     elif epoch == next_epoch:
-        current_committees_per_epoch = get_current_epoch_committee_count(state)
-        committees_per_epoch = get_next_epoch_committee_count(state)
-        shuffling_epoch = next_epoch
-
         epochs_since_last_registry_update = current_epoch - state.validator_registry_update_epoch
         if registry_change:
+            committees_per_epoch = get_next_epoch_committee_count(state)
+            shuffling_epoch = next_epoch
             seed = generate_seed(state, next_epoch)
+            current_committees_per_epoch = get_current_epoch_committee_count(state)
             shuffling_start_shard = (state.current_shuffling_start_shard + current_committees_per_epoch) % SHARD_COUNT
         elif epochs_since_last_registry_update > 1 and is_power_of_two(epochs_since_last_registry_update):
+            committees_per_epoch = get_next_epoch_committee_count(state)
+            shuffling_epoch = next_epoch
             seed = generate_seed(state, next_epoch)
             shuffling_start_shard = state.current_shuffling_start_shard
         else:
+            committees_per_epoch = get_current_epoch_committee_count(state)
+            shuffling_epoch = state.current_shuffling_epoch
             seed = state.current_shuffling_seed
             shuffling_start_shard = state.current_shuffling_start_shard