diff --git a/webtools/tinderbox/showbuilds.cgi b/webtools/tinderbox/showbuilds.cgi
index 621ebf1e0da..efcadba3cb5 100755
--- a/webtools/tinderbox/showbuilds.cgi
+++ b/webtools/tinderbox/showbuilds.cgi
@@ -583,6 +583,7 @@ sub print_javascript {
       margin: -5em 0 0 -5em;
       }
     .who#popup{
+      border: 0px;
       height: 8em;
       width: 16em;
       }