diff --git a/build-constraints.yaml b/build-constraints.yaml
index ccdc0014..d738cc7b 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3617,6 +3617,7 @@ packages:
         - herms < 0
 
     "Sergey Vinokurov <serg.foo@gmail.com> @sergv":
+        - bencoding
         - emacs-module
         - tasty-ant-xml