diff --git a/src/math/line.ts b/src/math/line.ts
index 28a636e..2e38f81 100644
--- a/src/math/line.ts
+++ b/src/math/line.ts
@@ -111,6 +111,9 @@ export class LineSegment extends Line implements Collidable {
 		if (this.distancePoint(move.p1) < 0)
 			return false;
 
+		if (crossz(move.v, this.v) < 0)
+			return false;
+
 		const t = this.getNormal(vec2.create());
 		vec2.scale(t, t, -r);