diff --git a/ql-https.lisp b/ql-https.lisp
index 48b40d1..d0e2cb5 100644
--- a/ql-https.lisp
+++ b/ql-https.lisp
@@ -67,7 +67,8 @@
          (release (find http-url all-releases
                         :test #'string=
                         :key #'ql-dist:archive-url)))
-    (ql-dist:project-name release)))
+    (when release
+      (ql-dist:project-name release))))
 
 #+sbcl
 (defun md5 (file)