diff --git a/_extensions/cours/extra/environments.tex b/_extensions/cours/extra/environments.tex
index 6ac2a16..63be26b 100644
--- a/_extensions/cours/extra/environments.tex
+++ b/_extensions/cours/extra/environments.tex
@@ -1116,3 +1116,14 @@
 %}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
+\newsavebox{\fminipagebox}
+\NewDocumentEnvironment{fminipage}{m O{\fboxsep}}
+{\par\kern#2\noindent\begin{lrbox}{\fminipagebox}
+    \begin{minipage}{#1}\ignorespaces}
+    {\end{minipage}\end{lrbox}%
+  \makebox[#1]{%
+    \kern\dimexpr-\fboxsep-\fboxrule\relax
+    \fbox{\usebox{\fminipagebox}}%
+    \kern\dimexpr-\fboxsep-\fboxrule\relax
+  }\par\kern#2
+}
\ No newline at end of file