diff --git a/lib/serializer/Connection.cpp b/lib/serializer/Connection.cpp
index 8767207a1..e3960a799 100644
--- a/lib/serializer/Connection.cpp
+++ b/lib/serializer/Connection.cpp
@@ -278,7 +278,9 @@ void CConnection::enableSmartVectorMemberSerializatoin()
 	CSerializer::smartVectorMembersSerialization = true;
 }
 
-std::ostream & operator<<(std::ostream &str, const CConnection &cpc)
- {
-	return str << "Connection with " << cpc.name << " (ID: " << cpc.connectionID << /*", " << (cpc.host ? "host" : "guest") <<*/ ")";
- }
+std::string CConnection::toString() const
+{
+    boost::format fmt("Connection with %s (ID: %d)");
+    fmt % name % connectionID;
+    return fmt.str();
+}
diff --git a/lib/serializer/Connection.h b/lib/serializer/Connection.h
index 01eb52f58..1758c0168 100644
--- a/lib/serializer/Connection.h
+++ b/lib/serializer/Connection.h
@@ -90,6 +90,8 @@ public:
 	void prepareForSendingHeroes(); //disables sending vectorized, enables smart pointer serialization, clears saved/loaded ptr cache
 	void enterPregameConnectionMode();
 
+	std::string toString() const;
+
 	template<class T>
 	CConnection & operator>>(T &t)
 	{
@@ -104,5 +106,3 @@ public:
 		return * this;
 	}
 };
-
-DLL_LINKAGE std::ostream &operator<<(std::ostream &str, const CConnection &cpc);
diff --git a/server/CVCMIServer.cpp b/server/CVCMIServer.cpp
index 8722f9b92..0fca27ed0 100644
--- a/server/CVCMIServer.cpp
+++ b/server/CVCMIServer.cpp
@@ -78,7 +78,7 @@ void CPregameServer::handleConnection(CConnection *cpc)
 			CPackForSelectionScreen *cpfs = nullptr;
 			*cpc >> cpfs;
 
-			logNetwork->infoStream() << "Got package to announce " << typeid(*cpfs).name() << " from " << *cpc;
+			logNetwork->info("Got package to announce %s from %s", typeid(*cpfs).name(), cpc->toString());
 
 			boost::unique_lock<boost::recursive_mutex> queueLock(mx);
 			bool quitting = dynamic_ptr_cast<QuitMenuWithoutStarting>(cpfs),
@@ -110,7 +110,7 @@ void CPregameServer::handleConnection(CConnection *cpc)
 	catch (const std::exception& e)
 	{
 		boost::unique_lock<boost::recursive_mutex> queueLock(mx);
-		logNetwork->errorStream() << *cpc << " dies... \nWhat happened: " << e.what();
+		logNetwork->error("%s dies... \nWhat happened: %s", cpc->toString(), e.what());
 	}
 
 	boost::unique_lock<boost::recursive_mutex> queueLock(mx);
@@ -132,7 +132,7 @@ void CPregameServer::handleConnection(CConnection *cpc)
 		}
 	}
 
-	logNetwork->infoStream() << "Thread listening for " << *cpc << " ended";
+	logNetwork->info("Thread listening for %s ended", cpc->toString());
 	listeningThreads--;
 	vstd::clear_pointer(cpc->handler);
 }
@@ -262,7 +262,7 @@ void CPregameServer::sendPack(CConnection * pc, const CPackForSelectionScreen &
 {
 	if(!pc->sendStop)
 	{
-		logNetwork->infoStream() << "\tSending pack of type " << typeid(pack).name() << " to " << *pc;
+		logNetwork->info("\tSending pack of type %s to %s", typeid(pack).name(), pc->toString());
 		*pc << &pack;
 	}
 
@@ -455,7 +455,7 @@ void CVCMIServer::start()
 			acc.join();
 			if (error)
 			{
-				logNetwork->warnStream()<<"Got connection but there is an error " << error;
+				logNetwork->warn("Got connection but there is an error %s", error.message());
 				return;
 			}
 			logNetwork->info("We've accepted someone... ");