diff --git a/.changelog/19139.txt b/.changelog/19139.txt
new file mode 100644
index 000000000..4fa892b24
--- /dev/null
+++ b/.changelog/19139.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+ui: Fixed an issue where purging a job with a namespace did not process correctly
+```
diff --git a/ui/app/adapters/job.js b/ui/app/adapters/job.js
index 8c4d9c3da..de7c71eb6 100644
--- a/ui/app/adapters/job.js
+++ b/ui/app/adapters/job.js
@@ -44,7 +44,12 @@ export default class JobAdapter extends WatchableNamespaceIDs {
   }
 
   purge(job) {
-    const url = this.urlForFindRecord(job.get('id'), 'job') + '?purge=true';
+    const url = addToPath(
+      this.urlForFindRecord(job.get('id'), 'job'),
+      '',
+      'purge=true'
+    );
+
     return this.ajax(url, 'DELETE');
   }