diff --git a/modoboa/extensions/webmail/static/webmail/css/webmail.css b/modoboa/extensions/webmail/static/webmail/css/webmail.css
index dd1748763..56ab39420 100644
--- a/modoboa/extensions/webmail/static/webmail/css/webmail.css
+++ b/modoboa/extensions/webmail/static/webmail/css/webmail.css
@@ -81,12 +81,12 @@ div.clickbox {
 }
 
 div.collapsed {
-    background-image: url("/static/pics/collapsed.png");
+    background-image: url("../../pics/collapsed.png");
     background-repeat: no-repeat;
 }
 
 div.expanded {
-    background-image: url("/static/pics/expanded.png");
+    background-image: url("../../pics/expanded.png");
     background-repeat: no-repeat;
 }