diff --git a/program/lib/Roundcube/rcube_imap_generic.php b/program/lib/Roundcube/rcube_imap_generic.php
index 5b87a40856..9119961d1c 100644
--- a/program/lib/Roundcube/rcube_imap_generic.php
+++ b/program/lib/Roundcube/rcube_imap_generic.php
@@ -3837,12 +3837,12 @@ public static function compressMessageSet($messages, $force=false)
         if (!is_array($messages)) {
             // if less than 255 bytes long, let's not bother
             if (!$force && strlen($messages) < 255) {
-                return preg_match('/[^0-9:,]/', $messages) ? 'INVALID' : $messages;
+                return preg_match('/[^0-9:,*]/', $messages) ? 'INVALID' : $messages;
             }
 
             // see if it's already been compressed
             if (strpos($messages, ':') !== false) {
-                return preg_match('/[^0-9:,]/', $messages) ? 'INVALID' : $messages;
+                return preg_match('/[^0-9:,*]/', $messages) ? 'INVALID' : $messages;
             }
 
             // separate, then sort