diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index b4bdf373536..34c96246c9f 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -177,6 +177,8 @@ Bug Fixes
 
 * SOLR-11296: Spellcheck parameters not working in new UI (Matt Pearce via janhoy)
 
+* SOLR-10975: New Admin UI Query does not URL-encode the query produced in the URL box (janhoy)
+
 Improvements
 ----------------------
 
diff --git a/solr/webapp/web/js/angular/services.js b/solr/webapp/web/js/angular/services.js
index 8eb148fb3ae..3391221e495 100644
--- a/solr/webapp/web/js/angular/services.js
+++ b/solr/webapp/web/js/angular/services.js
@@ -235,7 +235,7 @@ solrAdminServices.factory('System',
            for (key in params) {
                if (key != "core" && key != "handler") {
                    for (var i in params[key]) {
-                       qs.push(key + "=" + params[key][i]);
+                       qs.push(key + "=" + encodeURIComponent(params[key][i]));
                    }
                }
            }