diff --git a/lib/constants.js b/lib/constants.js
index 300fa98..d524237 100644
--- a/lib/constants.js
+++ b/lib/constants.js
@@ -157,6 +157,10 @@ Object.assign(exports, {
     ROAD_DECAY_AMOUNT: 100,
     ROAD_DECAY_TIME: 1000,
 
+    MOVE_FATIGUE_ROAD: 1,
+    MOVE_FATIGUE_PLAINS: 2,
+    MOVE_FATIGUE_SWAMP: 10,
+
     LINK_HITS: 1000,
     LINK_HITS_MAX: 1000,
     LINK_CAPACITY: 800,