diff --git a/publish/src/rdf/materialize.rs b/publish/src/rdf/materialize.rs
index c859cf8..fa64948 100644
--- a/publish/src/rdf/materialize.rs
+++ b/publish/src/rdf/materialize.rs
@@ -71,7 +71,7 @@ pub fn super_properties(store: &mut Store) -> error::Result<()> {
     }
 } WHERE {
     GRAPH ?g1 { ?property rdfs:subPropertyOf+ ?parent }
-    OPTIONAL { GRAPH ?g2 { ?subject ?parent ?object } }
+    OPTIONAL { GRAPH ?g2 { ?subject ?property ?object } }
 }"#)?;
 
     let old_size = store.len()?;