diff --git a/src/simulator/api-gdext/src/lib.rs b/src/simulator/api-gdext/src/lib.rs
index ddac7a20..8886f0f1 100644
--- a/src/simulator/api-gdext/src/lib.rs
+++ b/src/simulator/api-gdext/src/lib.rs
@@ -2421,6 +2421,10 @@ impl IRefCounted for GdGameState {
                 // the struct literal so the workspace compiles.
                 ransom_queue: Default::default(),
                 pending_capture_events: Default::default(),
+                // p3-10b: per-lair siege pressure state. Populated by the
+                // bridge as players begin sieges; serialized for save
+                // round-trip via `siege_pressure_as_pairs`.
+                siege_pressure: Default::default(),
             },
             base,
         }
diff --git a/src/simulator/crates/mc-combat/src/lair.rs b/src/simulator/crates/mc-combat/src/lair.rs
index b6cc3ae4..323005dd 100644
--- a/src/simulator/crates/mc-combat/src/lair.rs
+++ b/src/simulator/crates/mc-combat/src/lair.rs
@@ -27,7 +27,7 @@
 
 use serde::{Deserialize, Serialize};
 
-use mc_core::lair::{LairCombatMode, LairId, SiegeOutcome, SiegePressure, SiegeState};
+use mc_core::lair::{LairCombatMode, LairId, SiegeOutcome, SiegeState};
 
 use crate::bonuses::CombatBonuses;
 use crate::loot::{mix_seed, roll_loot_table, LootDrop, LootEntry};