diff --git a/public/app/plugins/datasource/prometheus/datasource.ts b/public/app/plugins/datasource/prometheus/datasource.ts
index d4d4ff8ff83..be1f54f7a86 100644
--- a/public/app/plugins/datasource/prometheus/datasource.ts
+++ b/public/app/plugins/datasource/prometheus/datasource.ts
@@ -140,7 +140,7 @@ export function PrometheusDatasource(instanceSettings, $q, backendSrv, templateS
 
     var interpolated;
     try {
-      interpolated = templateSrv.replace(query);
+      interpolated = templateSrv.replace(query, {}, this.interpolateQueryExpr);
     } catch (err) {
       return $q.reject(err);
     }