diff --git a/archiver/archive.go b/archiver/archive.go
index 370831de0..b773b635d 100644
--- a/archiver/archive.go
+++ b/archiver/archive.go
@@ -93,7 +93,7 @@ func buildArchiveHeader(info os.FileInfo, relativePath string) (*zip.FileHeader,
 	}
 
 	header.Method = zip.Deflate
-	header.Name = relativePath
+	header.Name = filepath.ToSlash(relativePath)
 	if info.IsDir() && !strings.HasSuffix(header.Name, "/") {
 		header.Name = header.Name + "/"
 	}
diff --git a/main_test.go b/main_test.go
index a76126231..1dc98a8ab 100644
--- a/main_test.go
+++ b/main_test.go
@@ -689,10 +689,7 @@ func listArchivedFiles(t *testing.T, body []byte) []byte {
 	var listing bytes.Buffer
 
 	for _, f := range zipReader.File {
-		// f.Name is populated from the zip file directly and is not validated for correctness.
-		// Using filepath.ToSlash(f.Name) ensures that the file name has the expected format
-		// regardless of the OS.
-		listing.WriteString(fmt.Sprintf("%d %s\n", f.UncompressedSize64, filepath.ToSlash(f.Name)))
+		listing.WriteString(fmt.Sprintf("%d %s\n", f.UncompressedSize64, f.Name))
 	}
 	return listing.Bytes()
 }