diff --git a/model/torrent.go b/model/torrent.go
index 9144d530..bb4c3b20 100644
--- a/model/torrent.go
+++ b/model/torrent.go
@@ -82,7 +82,7 @@ func (t *Torrents) ToJson() TorrentsJson {
 		Status:       t.Status,
 		Hash:         t.Hash,
 		Date:         time.Unix(t.Date, 0).Format(time.RFC3339),
-		Filesize:     util.FormatFilesize(t.Filesize),
+		Filesize:     util.FormatFilesize2(t.Filesize),
 		Description:  template.HTML(t.Description),
 		Comments:     b,
 		Sub_Category: strconv.Itoa(t.Sub_Category),
diff --git a/util/format.go b/util/format.go
index 18427e83..44eb12ca 100644
--- a/util/format.go
+++ b/util/format.go
@@ -25,3 +25,11 @@ func FormatFilesize(bytes int64) string {
     }
     return fmt.Sprintf("%.1f %s", value, unit)
 }
+
+func FormatFilesize2(bytes int64) string {
+	if bytes == 0 { // this is what gorm returns for NULL
+		return "Unknown"
+	} else {
+		return FormatFilesize(bytes)
+	}
+}