diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/50.structure-example/10.n1/textbook.en.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/50.structure-example/10.n1/textbook.en.md
index 7778883cd..3fc6bf5b0 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/50.structure-example/10.n1/textbook.en.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/40.electromagnetism/50.structure-example/10.n1/textbook.en.md
@@ -21,7 +21,7 @@ Chapter titles should be everyday, meaningful words.
 
 ----------------------------------------
 
-#### An example of what to do in terms of structure: level 1
+#### An example of what to do in terms of structure : level 1
 
 !! *BLOCK ELMAG1-1*
 !!