diff --git a/src/networkpluginserver.cpp b/src/networkpluginserver.cpp
index e77bca3514308700faaa257fe90c00a41ed8ad91..c8507c0314ed10260d3dd2aba6e61d3eadf7b8d9 100644
--- a/src/networkpluginserver.cpp
+++ b/src/networkpluginserver.cpp
@@ -355,6 +355,7 @@ void NetworkPluginServer::handleConnectedPayload(const std::string &data) {
 
 	User *user = m_userManager->getUser(payload.user());
 	if (!user) {
+		LOG4CXX_ERROR(logger, "Connected payload received for unknown user " << payload.user());
 		return;
 	}