diff --git a/libs/util/include/psemek/util/hash_table.hpp b/libs/util/include/psemek/util/hash_table.hpp
index a2f88323..dc3d77e8 100644
--- a/libs/util/include/psemek/util/hash_table.hpp
+++ b/libs/util/include/psemek/util/hash_table.hpp
@@ -372,6 +372,11 @@ namespace psemek::util
 			impl_.clear();
 		}
 
+		bool empty()
+		{
+			return impl_.size() == 0;
+		}
+
 		std::size_t size() const
 		{
 			return impl_.size();
@@ -432,6 +437,11 @@ namespace psemek::util
 			return impl_.size();
 		}
 
+		bool empty()
+		{
+			return impl_.size() == 0;
+		}
+
 	private:
 		detail::hash_table_impl<std::pair<Key const, Value>, detail::pair_hash<Key, Value, Hash>, detail::pair_equal<Key, Value, KeyEqual>> impl_;
 	};