diff --git a/include/rfl/Object.hpp b/include/rfl/Object.hpp
index eb888374..9a02be19 100644
--- a/include/rfl/Object.hpp
+++ b/include/rfl/Object.hpp
@@ -90,6 +90,8 @@ class Object {
   /// The number of elements currently inside the object.
   auto size() const { return data_.size(); }
 
+  std::size_t count(const key_type& key) const { return std::count_if(cbegin(), cend(), [&](const auto& p) { return p.first == key; }); }
+
   /// The maximum possible size.
   auto max_size() const { return data_.max_size(); }