diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/40.n3/30.en/30.beyond/annex.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/40.n3/30.en/30.beyond/annex.fr.md
index 39e3d6ca5..e3b21d08e 100644
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/40.n3/30.en/30.beyond/annex.fr.md
+++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/40.classical-mechanics/40.n3/30.en/30.beyond/annex.fr.md
@@ -4,7 +4,7 @@ published: true
 routable: true
 visible: false
 lessons:
-    - slug: classical mechanics-n3-linear
+    - slug: classical-mechanics-n3-linear
       order: 3
 ---