diff --git a/guix-data-service/web/compare/html.scm b/guix-data-service/web/compare/html.scm
index 6c43f8e..8711574 100644
--- a/guix-data-service/web/compare/html.scm
+++ b/guix-data-service/web/compare/html.scm
@@ -121,7 +121,8 @@
                     " and "
                     (a (@ (href ,(string-append "/revision/" target-commit)))
                        (samp ,(string-take target-commit 8) "…")))
-                ,@(if (apply string=? commit-range-link-url-templates)
+                ,@(if (and (not (null? commit-range-link-url-templates))
+                           (apply string=? commit-range-link-url-templates))
                       `((a (@ (href ,(git-repository-commit-range-link-template->url
                                       (first commit-range-link-url-templates)
                                       base-commit