1 files changed, 1 insertions, 0 deletions
diff --git a/file.go b/file.go
index 1469af0..fe5deca 100644
--- a/file.go
+++ b/file.go
@@ -182,6 +182,7 @@ func (f *File) writeToZip(zw *zip.Writer) error {
 	_ = f.sharedStringsLoader()
 	f.sharedStringsWriter()
 	f.styleSheetWriter()
+	f.themeWriter()
 
 	for path, stream := range f.streams {
 		fi, err := zw.Create(path)