diff --git a/polygerrit-ui/app/elements/plugins/gr-plugin-host/gr-plugin-host.js b/polygerrit-ui/app/elements/plugins/gr-plugin-host/gr-plugin-host.js
index a7cfca365c..c5bf21a530 100644
--- a/polygerrit-ui/app/elements/plugins/gr-plugin-host/gr-plugin-host.js
+++ b/polygerrit-ui/app/elements/plugins/gr-plugin-host/gr-plugin-host.js
@@ -102,8 +102,7 @@
       if (!pathOrUrl.startsWith('/')) {
         pathOrUrl = '/' + pathOrUrl;
       }
-      const {href, pathname} = window.location;
-      return href.split(pathname)[0] + this.getBaseUrl() + pathOrUrl;
+      return window.location.origin + this.getBaseUrl() + pathOrUrl;
     },
   });
 })();
diff --git a/polygerrit-ui/app/elements/plugins/gr-plugin-host/gr-plugin-host_test.html b/polygerrit-ui/app/elements/plugins/gr-plugin-host/gr-plugin-host_test.html
index daa86fad73..0880d73549 100644
--- a/polygerrit-ui/app/elements/plugins/gr-plugin-host/gr-plugin-host_test.html
+++ b/polygerrit-ui/app/elements/plugins/gr-plugin-host/gr-plugin-host_test.html
@@ -43,7 +43,7 @@ limitations under the License.
       sandbox = sinon.sandbox.create();
       sandbox.stub(document.body, 'appendChild');
       sandbox.stub(element, 'importHref');
-      url = window.location.href.split(window.location.pathname)[0];
+      url = window.location.origin;
     });
 
     teardown(() => {