diff --git a/includes/common.php b/includes/common.php
index 98d0eaf756..d0d1ee0ce1 100644
--- a/includes/common.php
+++ b/includes/common.php
@@ -27,6 +27,7 @@ function generate_priority_icon($priority)
         "notice"    => "application_edit",
         "info"      => "application",
         "debug"     => "bug",
+        ""          => "application",
     );
 
     return '<img src="images/16/' . $map[$priority] .'.png" title="' . $priority . '">';