diff --git a/src/push_solve.rs b/src/push_solve.rs
index 8b3f583..b2d32cc 100644
--- a/src/push_solve.rs
+++ b/src/push_solve.rs
@@ -1,5 +1,7 @@
 use strafesnet_common::integer::{Planar64,Planar64Vec3};
 
+const EPSILON:Planar64=Planar64::raw(1<<(32-10));
+
 type Indices=arrayvec::ArrayVec<usize,4>;
 
 struct Ray{
@@ -51,7 +53,7 @@ const fn solve0()->Planar64Vec3{
 fn solve1(c0:&Contact)->Option<Planar64Vec3>{
 	let d0=c0.normal.dot(c0.position);
 	let det=c0.normal.dot(c0.velocity);
-	if det.get().abs()<0{
+	if det.abs()<EPSILON{
 		None
 	}else{
 		Some(c0.normal*d0/det)