diff --git a/public/app/features/templating/constant_variable.ts b/public/app/features/templating/constant_variable.ts
index bf31dba96f9..59659459f85 100644
--- a/public/app/features/templating/constant_variable.ts
+++ b/public/app/features/templating/constant_variable.ts
@@ -16,6 +16,7 @@ export class ConstantVariable implements Variable {
     label: '',
     query: '',
     current: {},
+    options: [],
   };
 
   /** @ngInject **/