diff --git a/gnucash/report/report-system/report.scm b/gnucash/report/report-system/report.scm
index 82dd02f78d..ff9251f9c4 100644
--- a/gnucash/report/report-system/report.scm
+++ b/gnucash/report/report-system/report.scm
@@ -141,6 +141,8 @@ not found.")))
         (begin
           (if (gnc:report-template-name report-rec)
               (begin
+                (issue-deprecation-warning
+                 "report-definition without guid is deprecated. please define report with guid.")
                 ;; we've got an old style report with no report-id, give it an arbitrary one
                 (gnc:report-template-set-report-guid! report-rec (guid-new-return))
 
diff --git a/gnucash/report/report-system/test/test-report-system.scm b/gnucash/report/report-system/test/test-report-system.scm
index bb0895a47f..22ba89b4c9 100644
--- a/gnucash/report/report-system/test/test-report-system.scm
+++ b/gnucash/report/report-system/test/test-report-system.scm
@@ -36,6 +36,7 @@
 ;; -----------------------------------------------------------------------
 
 (define (test-check2)
+  ;; this tests deprecated features
   (display "\n*** Missing GUID detection:\n")
   (gnc:define-report 'version "1"
                      'name "Test Report Template")