diff --git a/main/css/base.css b/main/css/base.css
index 1f61b29b26..c15fa74600 100755
--- a/main/css/base.css
+++ b/main/css/base.css
@@ -5201,7 +5201,6 @@ ul#navigation .report a {
 }
 .thematic-postit .accordion-heading .title-accordion{
     padding:0px;
-    background:url(thematic.png) no-repeat left bottom transparent;
 }
 
 .thematic-postit .name-student h2{