diff --git a/opossum/examples/mirror.rs b/opossum/examples/mirror.rs
index ca155644ca8e37281ca0a0f2bfd2ab8c5cbc207a..8afcf80eab50cd9a67729183e5c3d7b297b39094 100644
--- a/opossum/examples/mirror.rs
+++ b/opossum/examples/mirror.rs
@@ -31,7 +31,7 @@ fn main() -> OpmResult<()> {
     let i_m2 = scenery.add_node(
         &ThinMirror::new("mirror 2")
             .with_curvature(millimeter!(-100.0))?
-            .with_tilt(degree!(22.5, 0.0, 0.0))?,
+            .with_tilt(degree!(-22.5, 0.0, 0.0))?,
     )?;
     let i_prop_vis = scenery.add_node(&RayPropagationVisualizer::default())?;
     let i_sd = scenery.add_node(&SpotDiagram::default())?;