diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index b519912..56175d9 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -1693,6 +1693,16 @@
     if (res < 0)
         goto error;
 
+#ifdef MULTIARCH
+    value = PyUnicode_FromString(MULTIARCH);
+    if (value == NULL)
+        goto error;
+    res = PyDict_SetItemString(impl_info, "_multiarch", value);
+    Py_DECREF(value);
+    if (res < 0)
+        goto error;
+#endif
+
     /* dict ready */
 
     ns = _PyNamespace_New(impl_info);