diff --git a/re2/pod_array.h b/re2/pod_array.h
index e8093ad..f234e97 100644
--- a/re2/pod_array.h
+++ b/re2/pod_array.h
@@ -13,7 +13,7 @@
 template <typename T>
 class PODArray {
  public:
-  static_assert(std::is_pod<T>::value,
+  static_assert(std::is_trivial<T>::value && std::is_standard_layout<T>::value,
                 "T must be POD");
 
   PODArray()