diff --git a/trac/htdocs/libcaca.css b/trac/htdocs/libcaca.css
index 1990b73..7c17f7a 100644
--- a/trac/htdocs/libcaca.css
+++ b/trac/htdocs/libcaca.css
@@ -456,7 +456,7 @@ input[type="reset"]:hover,
     background: #669900 url(bouton.png) no-repeat center top;
 }
 #delete input[type="submit"] {
-    background: rgba(240, 215, 215) url(bouton.png) no-repeat center top;
+    background: rgb(240, 215, 215) url(bouton.png) no-repeat center top;
 }
 #attachments input[type="button"], 
 #attachments input[type="submit"],