diff --git a/jl-cours/mdtheorem.tex b/jl-cours/mdtheorem.tex
index 3148b2b..9dd9953 100644
--- a/jl-cours/mdtheorem.tex
+++ b/jl-cours/mdtheorem.tex
@@ -64,6 +64,14 @@
   \end{@thm2*}
 }
 
+% coroallaire
+\mdtheorem[style=pencil, theoremseparator={},
+           theoremspace={}, roundcorner=6pt,
+           outerlinewidth=1pt, outerlinecolor=black]{@coro1}{\Jd Corollaire}
+\mdtheorem[style=nologo, theoremseparator={},
+           theoremspace={}, roundcorner=6pt,
+           outerlinewidth=1pt, outerlinecolor=black]{@coro2}{\Jd Corollaire}
+
 \RenewDocumentEnvironment{@coro1}{ o } {%begin
   \IfNoValueTF {#1} {
     \begin{@coro1*}