diff --git a/src/core/configuration/Config.ts b/src/core/configuration/Config.ts
index ad70b48ec..7e508e596 100644
--- a/src/core/configuration/Config.ts
+++ b/src/core/configuration/Config.ts
@@ -131,6 +131,8 @@ export interface Config {
   defensePostDefenseBonus(): number;
   falloutDefenseModifier(): number;
   difficultyModifier(difficulty: Difficulty): number;
+  // 0-1
+  traitorDefenseDebuff(): number;
 }
 
 export interface Theme {
diff --git a/src/core/configuration/DefaultConfig.ts b/src/core/configuration/DefaultConfig.ts
index 4d60b2984..fb4127e0c 100644
--- a/src/core/configuration/DefaultConfig.ts
+++ b/src/core/configuration/DefaultConfig.ts
@@ -60,6 +60,10 @@ export class DefaultConfig implements Config {
     private _gameConfig: GameConfig,
     private _userSettings: UserSettings,
   ) {}
+
+  traitorDefenseDebuff(): number {
+    return 0.8;
+  }
   spawnImmunityDuration(): Tick {
     return 5 * 10;
   }
@@ -352,7 +356,8 @@ export class DefaultConfig implements Config {
           within(defender.troops() / attackTroops, 0.5, 2) *
           mag *
           0.8 *
-          largeModifier,
+          largeModifier *
+          (defender.isTraitor() ? this.traitorDefenseDebuff() : 1),
         defenderTroopLoss: defender.troops() / defender.numTilesOwned(),
         tilesPerTickUsed:
           within(defender.troops() / (5 * attackTroops), 0.2, 1.5) *