diff --git a/engine/physics/src/physics.rs b/engine/physics/src/physics.rs
index 26782e8f..a3ea851c 100644
--- a/engine/physics/src/physics.rs
+++ b/engine/physics/src/physics.rs
@@ -1000,7 +1000,7 @@ impl PhysicsData{
 				// check if point of intersection is behind face edges
 				// *2 because average of 2 vertices
 				let p=ray.extrapolate(t)*2;
-				mesh.face_edges(face_id).iter().all(|&directed_edge_id|{
+				mesh.face_edges(face_id).as_ref().iter().all(|&directed_edge_id|{
 					let edge_n=mesh.directed_edge_n(directed_edge_id);
 					let cross_n=edge_n.cross(n);
 					let &[vert0,vert1]=mesh.edge_verts(directed_edge_id.as_undirected()).as_ref();