diff --git a/server/server.go b/server/server.go
index fc95364..606649e 100644
--- a/server/server.go
+++ b/server/server.go
@@ -1,6 +1,7 @@
 package server
 
 import (
+	"fmt"
 	"log"
 	"os"
 	"regexp"
@@ -171,6 +172,8 @@ func handleArtistAlbumPage(w http.ResponseWriter, req *http.Request) {
 				}
 				w.Header().Set("Content-Disposition", `attachment; filename="` +
 					strings.ReplaceAll(album.Name, `"`, `'`) + `.tar.gz"`)
+				w.Header().Set("Content-Length",
+					fmt.Sprintf("%d", album.TarballSize))
 				w.Write(contents)
 				return
 			}