diff --git a/exercices/electricite.md b/exercices/electricite.md
index 2a17ec2378244c9e373011f076e3330b8ab48f76..305f8230a0aad69264132d47abf75508c93e4c5a 100644
--- a/exercices/electricite.md
+++ b/exercices/electricite.md
@@ -21,7 +21,7 @@ pandoc-numbering:
 urlcolor: blue
 ---
 \newcommand{\m}{\mathrm{m}}
-\renewcommand{\C}{\mathrm{C}}
+\newcommand{\C}{\mathrm{C}}
 \newcommand{\V}{\mathrm{V}}
 \newcommand{\mm}{\mathrm{mm}}
 \newcommand{\cm}{\mathrm{cm}}