diff --git a/packages/make-windows-dir.bat b/packages/make-windows-dir.bat
index 28eccbc4..e2f386d7 100644
--- a/packages/make-windows-dir.bat
+++ b/packages/make-windows-dir.bat
@@ -43,6 +43,7 @@ mkdir pamhyr\mage
 copy /y ..\mage-windows\mage.exe pamhyr\mage\
 copy /y ..\mage-windows\mage_extraire.exe pamhyr\mage\
 copy /y ..\mage-windows\mailleurPF.exe pamhyr\mage\
+copy /y ..\mage-windows\libbief.dll pamhyr\mage\
 
 rem Copy tests_cases
 mkdir pamhyr\tests_cases