diff --git a/libs/random/include/psemek/random/generator.hpp b/libs/random/include/psemek/random/generator.hpp
index 4831a862..611f4ba1 100644
--- a/libs/random/include/psemek/random/generator.hpp
+++ b/libs/random/include/psemek/random/generator.hpp
@@ -52,6 +52,20 @@ namespace psemek::random
 			return std::numeric_limits<result_type>::max();
 		}
 
+		template <typename OStream>
+		friend void write(OStream & stream, generator const & gen)
+		{
+			write(stream, gen.state_);
+			write(stream, gen.inc_);
+		}
+
+		template <typename IStream>
+		friend void read(IStream & stream, generator & gen)
+		{
+			read(stream, gen.state_);
+			read(stream, gen.inc_);
+		}
+
 	private:
 		std::uint64_t state_ = 0;
 		std::uint64_t inc_ = 0;