diff --git a/reference/SignPDF/SignPDF.upp b/reference/SignPDF/SignPDF.upp
index 86f10fb8a..d9585b28e 100644
--- a/reference/SignPDF/SignPDF.upp
+++ b/reference/SignPDF/SignPDF.upp
@@ -1,3 +1,5 @@
+description "Adding digital signature to the PDF file\377";
+
 uses
 	Core,
 	PdfDraw,