diff --git a/src/network/TCPListener.cpp b/src/network/TCPListener.cpp
index 5388bc5..3bf9940 100644
--- a/src/network/TCPListener.cpp
+++ b/src/network/TCPListener.cpp
@@ -260,7 +260,7 @@ R"({
             while (!client->m_queue.empty())
             {
                 NetworkMessage *msg = client->m_queue.front();
-                printf("Writing packet of size %u\n", msg->GetDataSize());
+                printf("Writing packet of size %u\n", uint32_t(msg->GetDataSize()));
                 bufferevent_write(client->m_bufferEvent, msg->GetData(), msg->GetDataSize());
                 client->m_queue.pop();
             }