diff --git a/lib/app/server.js b/lib/app/server.js
index fa5cff0c75..f4b2ec16d4 100644
--- a/lib/app/server.js
+++ b/lib/app/server.js
@@ -81,7 +81,7 @@ export default context => {
     // nuxtServerInit
     <% if (store) { %>
       let promise = (store._actions && store._actions.nuxtServerInit ? store.dispatch('nuxtServerInit', omit(getContext(context), 'redirect', 'error')) : null)
-      if (!(promise instanceof Promise)) promise = Promise.resolve()
+      if (!promise || (!(promise instanceof Promise) && (promise && typeof promise.then !== 'function'))) promise = Promise.resolve()
     <% } else { %>
       let promise = Promise.resolve()
     <% } %>