diff --git a/distillery/resources/compose/barrel/conf/wisski.conf b/distillery/resources/compose/barrel/conf/wisski.conf
index 14d3601..8bc1cc4 100644
--- a/distillery/resources/compose/barrel/conf/wisski.conf
+++ b/distillery/resources/compose/barrel/conf/wisski.conf
@@ -8,6 +8,7 @@
         AddType application/rdf+xml .rdf
 
         # Rewrite the 'ontology' directory
+        RewriteEngine On
         ReWriteRule ^(ontology/[^/]+/).+ $1 [R=303,L]
         ReWriteRule ^(ontology/[^/]+)/$ sites/default/files/$1.owl [L]