diff --git a/src/google/protobuf/port_def.inc b/src/google/protobuf/port_def.inc
index 8bd06d340f7c3..cae9ebe01ec2c 100644
--- a/src/google/protobuf/port_def.inc
+++ b/src/google/protobuf/port_def.inc
@@ -434,19 +434,26 @@
# define PROTOBUF_EXPORT __declspec(dllexport)
# define PROTOBUF_EXPORT_TEMPLATE_DECLARE
# define PROTOBUF_EXPORT_TEMPLATE_DEFINE __declspec(dllexport)
+# define PROTOBUF_CONSTINIT_WITH_PTR PROTOBUF_CONSTINIT
# else
# define PROTOBUF_EXPORT __declspec(dllimport)
# define PROTOBUF_EXPORT_TEMPLATE_DECLARE
# define PROTOBUF_EXPORT_TEMPLATE_DEFINE __declspec(dllimport)
+// Pointers to dllimport extern variables on Windows require a static
+// initialization and cannot be constant-initialized. This macro disables
+// constinit in files where we cannot support it.
+# define PROTOBUF_CONSTINIT_WITH_PTR
# endif // defined(LIBPROTOBUF_EXPORTS)
#elif defined(PROTOBUF_USE_DLLS) && defined(LIBPROTOBUF_EXPORTS)
# define PROTOBUF_EXPORT __attribute__((visibility("default")))
# define PROTOBUF_EXPORT_TEMPLATE_DECLARE __attribute__((visibility("default")))
# define PROTOBUF_EXPORT_TEMPLATE_DEFINE
+# define PROTOBUF_CONSTINIT_WITH_PTR PROTOBUF_CONSTINIT
#else
# define PROTOBUF_EXPORT
# define PROTOBUF_EXPORT_TEMPLATE_DECLARE
# define PROTOBUF_EXPORT_TEMPLATE_DEFINE
+# define PROTOBUF_CONSTINIT_WITH_PTR PROTOBUF_CONSTINIT
#endif
#ifdef PROTOC_EXPORT
diff --git a/src/google/protobuf/port_undef.inc b/src/google/protobuf/port_undef.inc
index 58136a4b47350..056c9b790ba4d 100644
--- a/src/google/protobuf/port_undef.inc
+++ b/src/google/protobuf/port_undef.inc
@@ -80,6 +80,7 @@
#undef PROTOBUF_THREAD_LOCAL
#undef PROTOBUF_MESSAGE_OWNED_ARENA_EXPERIMENT
#undef PROTOBUF_CONSTINIT
+#undef PROTOBUF_CONSTINIT_WITH_PTR
#undef PROTOBUF_CONSTEXPR
#undef PROTOBUF_ATTRIBUTE_WEAK
#undef PROTOBUF_HAVE_ATTRIBUTE_WEAK
--
2.37.0.rc0.104.g0611611a94-goog