diff --git a/clients/javascript/my-strategy.js b/clients/javascript/my-strategy.js
index 6d8ed57..c4e4e8e 100644
--- a/clients/javascript/my-strategy.js
+++ b/clients/javascript/my-strategy.js
@@ -16,7 +16,7 @@ class MyStrategy {
                 return u.playerId !== unit.playerId;
             })
             .reduce(function (prev, u) {
-                let currentDistance = distanceSqr(u, unit);
+                let currentDistance = distanceSqr(u.position, unit.position);
                 if (currentDistance < minDistance) {
                     minDistance = currentDistance;
                     return u;
@@ -30,7 +30,7 @@ class MyStrategy {
                 return box.item instanceof Item.Weapon;
             })
             .reduce(function (prev, box) {
-                let currentDistance = distanceSqr(box, unit);
+                let currentDistance = distanceSqr(box.position, unit.position);
                 if (currentDistance < minDistance) {
                     minDistance = currentDistance;
                     return box;