diff --git a/11ty/filters/_tests/definitionPermalink.spec.js b/11ty/filters/_tests/definitionPermalink.spec.js
index 8a971b3a..fa7d2859 100644
--- a/11ty/filters/_tests/definitionPermalink.spec.js
+++ b/11ty/filters/_tests/definitionPermalink.spec.js
@@ -3,5 +3,5 @@ import test from 'ava';
 import definitionPermalink from '../definitionPermalink';
 
 test('constructs correct detail link', (t) => {
-  t.is(definitionPermalink('test-slug'), '/definitions/test-slug/');
+  t.is(definitionPermalink('test-slug'), '/#test-slug');
 });
diff --git a/11ty/filters/definitionPermalink.js b/11ty/filters/definitionPermalink.js
index b9d05ee7..7bddb523 100644
--- a/11ty/filters/definitionPermalink.js
+++ b/11ty/filters/definitionPermalink.js
@@ -1,3 +1,3 @@
 module.exports = function(slug) {
-  return `/definitions/${slug}/`;
+  return `/#${slug}`;
 };