diff --git a/specs/phase1/shard-transition.md b/specs/phase1/shard-transition.md
index ce6d289bd..f9de34b31 100644
--- a/specs/phase1/shard-transition.md
+++ b/specs/phase1/shard-transition.md
@@ -71,21 +71,22 @@ def verify_shard_block_signature(beacon_state: BeaconState,
 def shard_state_transition(beacon_state: BeaconState,
                            shard_state: ShardState,
                            block: ShardBlock) -> None:
-    # Update shard state
+    """
+    Update ``shard_state`` with shard ``block`` and ``beacon_state`.
+    """
+    shard_state.slot = block.slot
     prev_gasprice = shard_state.gasprice
-    if len(block.body) == 0:
-        latest_block_root = shard_state.latest_block_root
-    else:
-        latest_block_root = hash_tree_root(block)
-
+    shard_state.gasprice = compute_updated_gasprice(prev_gasprice, len(block.body))
     shard_state.transition_digest = compute_shard_transition_digest(
         beacon_state,
         shard_state,
         block.beacon_parent_root,
         hash_tree_root(block.body),
     )
-    shard_state.gasprice = compute_updated_gasprice(prev_gasprice, len(block.body))
-    shard_state.slot = block.slot
+    if len(block.body) == 0:
+        latest_block_root = shard_state.latest_block_root
+    else:
+        latest_block_root = hash_tree_root(block)
     shard_state.latest_block_root = latest_block_root
 ```