diff --git a/tensorboard/plugins/projector/vz_projector/vz-projector-app.html b/tensorboard/plugins/projector/vz_projector/vz-projector-app.html
index faf798e85e..264ff518dc 100644
--- a/tensorboard/plugins/projector/vz_projector/vz-projector-app.html
+++ b/tensorboard/plugins/projector/vz_projector/vz-projector-app.html
@@ -134,6 +134,7 @@
         pageViewLogging: {type: Boolean, value: false},
         eventLogging: {type: Boolean, value: false},
         projectorConfigJsonPath: {type: String, value: ''},
+        routePrefix: {type: String, value: ''},
         servingMode: {type: String, value: ''},
         documentationLink: {type: String, value: ''},
         bugReportLink: {type: String, value: ''},