diff --git a/850.split-ambiguities/a.yaml b/850.split-ambiguities/a.yaml
index ff76c2ee7..942d0e54b 100644
--- a/850.split-ambiguities/a.yaml
+++ b/850.split-ambiguities/a.yaml
@@ -42,6 +42,7 @@
 - { name: ape, wwwpart: biology, setname: ape-plasmid-editor }
 - { name: ape, wwwpart: ape-project.org, setname: ape-ajax-push-engine }
 - { name: ape, wwwpart: tddft, setname: ape-atomic-pseudopotentials-engine }
+- { name: ape, ruleset: nix, setname: ape-attempto-controlled-english }
 - { name: ape, warning: "please classify me" }
 
 - { name: arb, wwwpart: [fredrikj,arblib], setname: arb-fp }