diff --git a/HowtoAmavis.md b/HowtoAmavis.md
index b015883e..dfc6e4c2 100644
--- a/HowtoAmavis.md
+++ b/HowtoAmavis.md
@@ -159,6 +159,7 @@ $banned_filename_re = new_RE(
   qr'.\.(exe|vbs|pif|scr|bat|cmd|com|cpl)$'i,
   qr'^\.(exe-ms)$',
 );
+~~~
 
 
 ## Filtres externes