diff --git a/emper/Fiber.cpp b/emper/Fiber.cpp
index 479b26275c980b92641c4991ee19b4052aaffa36..c6e578ca07a57e391e86e6dccf96be08537dac0c 100644
--- a/emper/Fiber.cpp
+++ b/emper/Fiber.cpp
@@ -13,7 +13,19 @@ void Fiber::run() const {
 std::ostream& operator<<(std::ostream& strm, const Fiber& fiber) {
 	strm << "Fiber [ptr=" << &fiber
 		 << " func=" << fiber.function.target<void(void*)>()
-		 << " arg=" << fiber.arg
-		 << "]";
+		 << " arg=" << fiber.arg;
+
+	if (fiber.affinity) {
+		strm << " aff=" << fiber.affinity;
+	} else {
+		strm << " aff=nullptr";
+	}
+
+	strm << "]";
+
 	return strm;
 }
+
+void Fiber::print() const {
+	std::cout << this << std::endl;
+}
diff --git a/emper/Fiber.hpp b/emper/Fiber.hpp
index 6d2de832d3bc686947dc1a396bf9a56e613e1f6e..4a88f185c3a7b70c8ab70e1dba8d44e32b9bd994 100644
--- a/emper/Fiber.hpp
+++ b/emper/Fiber.hpp
@@ -127,6 +127,8 @@ public:
 		return *affinity;
 	}
 
+	void print() const;
+
 	friend std::ostream& operator<<(std::ostream&, const Fiber&);
 
 	static inline Fiber* from(fiber_fun_t function, void* arg) {