diff --git a/views/documents/pdf.ctp b/views/documents/pdf.ctp
index f6558ef0..d3f92b79 100755
--- a/views/documents/pdf.ctp
+++ b/views/documents/pdf.ctp
@@ -28,6 +28,10 @@ $your_reference = 'Enquiry on '.date('j M Y');
 $issue_date = $document['Quote']['date_issued'];
 
 $pdfdoc->docRef = $enquiryNumber;
+if($document['Quote']['revision'] > 0) {
+    $enquiryNumber = $enquiryNumber.'rev'.$document['Quote']['revision'];
+}
+
 
 foreach($document['DocPage'] as $page) {