diff --git a/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md b/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md
index f06c93835..b14fe4bad 100644
--- a/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md
+++ b/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md
@@ -381,7 +381,7 @@ en un point où règne le champ d’induction magnétique $`\overrightarrow{B}`$
 EN : For a point particle of electric charge $`q`$ and velocity vector $`\overrightarrow{v}`$ located at a point where
 previals an magnetic field induction $`\overrightarrow{B}`$  :
 
-LA , EN : $`\overrightarrow{F}_{Lor} = q \;\overrightarrow{v}\times\rightoverline{B}`$ 
+LA , EN : $`\overrightarrow{F}_{Lor} = q \;\overrightarrow{v} \times \overrightarrow{B}`$ 
 
 FR : $`\overrightarrow{F}_{Lor} = q \;\overrightarrow{v}\land\overrightarrow{B}`$