diff --git a/preview.go b/preview.go
index b43b416..a7e8bde 100644
--- a/preview.go
+++ b/preview.go
@@ -24,7 +24,7 @@ func (this *Server) handlePreview(w http.ResponseWriter, fileIDList string) {
`
- if len(this.opts.ServerPublicPropertyies.CanonicalBaseURL) > 0 {
+ if len(this.opts.ServerPublicProperties.CanonicalBaseURL) > 0 {
tmpl += `
`