diff --git a/src/serialization/vector.h b/src/serialization/vector.h
index 9a0c0ee56..d07472352 100644
--- a/src/serialization/vector.h
+++ b/src/serialization/vector.h
@@ -16,6 +16,13 @@ namespace serialization
       return ::do_serialize(ar, e);
     }
 
+    template <typename Archive>
+    bool serialize_vector_element(Archive& ar, uint32_t& e)
+    {
+      ar.serialize_varint(e);
+      return true;
+    }
+
     template <typename Archive>
     bool serialize_vector_element(Archive& ar, uint64_t& e)
     {