diff --git a/src/outline.wgsl b/src/outline.wgsl
index 0993fc6..f82e5d3 100644
--- a/src/outline.wgsl
+++ b/src/outline.wgsl
@@ -63,7 +63,7 @@ fn vertex(vertex: VertexInput) -> @builtin(position) vec4<f32> {
 #ifdef FLAT_DEPTH
     let out_zw = vec2<f32>(model_origin_z(vstage.origin, view.view_proj) * clip_pos.w, clip_pos.w);
 #else
-    let out_zw = clip_pos.wz;
+    let out_zw = clip_pos.zw;
 #endif
 #ifdef OFFSET_ZERO
     let out_xy = clip_pos.xy;
diff --git a/src/pipeline.rs b/src/pipeline.rs
index 1224c08..a368b50 100644
--- a/src/pipeline.rs
+++ b/src/pipeline.rs
@@ -304,7 +304,9 @@ impl SpecializedMeshPipeline for OutlinePipeline {
                 depth_compare: CompareFunction::Greater,
                 stencil: StencilState::default(),
                 bias: DepthBiasState {
-                    constant: if key.pass_type() == PassType::Stencil {
+                    constant: if key.depth_mode() == DepthMode::Flat
+                        && key.pass_type() == PassType::Stencil
+                    {
                         2 // 1 is empirically not enough to prevent Z-fighting.
                     } else {
                         0