diff --git a/libs/util/include/psemek/util/signal.hpp b/libs/util/include/psemek/util/signal.hpp
index 73893fc0..b1858b5a 100644
--- a/libs/util/include/psemek/util/signal.hpp
+++ b/libs/util/include/psemek/util/signal.hpp
@@ -22,6 +22,11 @@ namespace psemek::util
 			return token;
 		}
 
+		void subscribe_forever(subscriber callback) const
+		{
+			tokens_.push_back(subscribe(std::move(callback)));
+		}
+
 		void operator()(Args const & ... args)
 		{
 			auto subscribers = std::move(subscribers_);
@@ -52,6 +57,7 @@ namespace psemek::util
 
 	private:
 		mutable std::vector<std::weak_ptr<subscriber>> subscribers_;
+		mutable std::vector<subscription_token> tokens_;
 	};
 
 }