diff --git a/src/satx.js b/src/satx.js
index 8b27b25..fab4dcb 100644
--- a/src/satx.js
+++ b/src/satx.js
@@ -84,7 +84,7 @@ export default class SATX {
   }
 
   static line(from, to) {
-    return new SAT.Polygon(new SAT.Vector(...from.toArray()), [new SAT.Vector(), new SAT.Vector(...to.toArray())])
+    return new SAT.Polygon(new SAT.Vector(...from.toArray()), [new SAT.Vector(), new SAT.Vector(...to.clone().sub(from).toArray())])
   }
 
   static polygonToThreeVector2(polygon) {