diff --git a/htdocs/theme/yellow/yellow.css b/htdocs/theme/yellow/yellow.css
index 1c262e31dcf..e617b302d3a 100644
--- a/htdocs/theme/yellow/yellow.css
+++ b/htdocs/theme/yellow/yellow.css
@@ -570,10 +570,7 @@ tr.liste_titre {
     background: #BBBB88;
     font: helvetica, verdana, arial, sans-serif;
     font-weight: bold;
-    border-left: 1px solid #FFFFFF;
-    border-right: 1px solid #FFFFFF;
-    border-top: 1px solid #FFFFFF;
-    border-bottom: 1px solid #FFFFFF;
+    border-bottom: 1px solid #000000;
     white-space: nowrap;
 }