diff --git a/unit.cpp b/unit.cpp
index a0f08e7..ced0f44 100644
--- a/unit.cpp
+++ b/unit.cpp
@@ -101,9 +101,22 @@ void Unit::update(float deltaTime, float tickDuration, float simSpeedMultiplier,
         return;
     }
 
-    // Speed in hexes per second: movementSpeed points per tickDuration seconds
+    // Current segment movement step cost (considering terrain type and slope)
+    float stepCost = 1.0f;
+    if (pathIndex + 1 < path.size()) {
+        int fromX = path[pathIndex].first;
+        int fromY = path[pathIndex].second;
+        int toX = path[pathIndex + 1].first;
+        int toY = path[pathIndex + 1].second;
+        stepCost = TerrainMovementManager::instance().calculateStepCost(
+            fromX, fromY, toX, toY, config.movementDomain, mapPoints, numPoints05, &config
+        );
+        if (stepCost <= 0.05f) stepCost = 1.0f;
+    }
+
+    // Speed in hexes per second: movementSpeed points per tickDuration seconds divided by stepCost
     float effectiveTickDuration = std::max(0.1f, tickDuration);
-    float hexesPerSec = (config.movementSpeed / effectiveTickDuration) * simSpeedMultiplier;
+    float hexesPerSec = (config.movementSpeed / (effectiveTickDuration * stepCost)) * simSpeedMultiplier;
 
     moveProgress += deltaTime * hexesPerSec;