diff --git a/sign/pdfxref.go b/sign/pdfxref.go
index 96d411e..1a87919 100644
--- a/sign/pdfxref.go
+++ b/sign/pdfxref.go
@@ -28,8 +28,8 @@ func (context *SignContext) writeXref() error {
 
 func (context *SignContext) writeXrefTable() error {
 	// @todo: maybe we need a prev here too.
-	xref_size := "xref\n0 " + strconv.FormatInt(context.PDFReader.XrefInformation.ItemCount, 10)
-	new_xref_size := "xref\n0 " + strconv.FormatInt(context.PDFReader.XrefInformation.ItemCount+4, 10)
+	xref_size := "xref\n0 " + strconv.FormatInt(context.PDFReader.XrefInformation.ItemCount, 10) + "\n"
+	new_xref_size := "xref\n0 " + strconv.FormatInt(context.PDFReader.XrefInformation.ItemCount+4, 10) + "\n"
 
 	if _, err := context.OutputBuffer.Write([]byte(new_xref_size)); err != nil {
 		return err