diff --git a/src/network/core/udp.cpp b/src/network/core/udp.cpp
--- a/src/network/core/udp.cpp
+++ b/src/network/core/udp.cpp
@@ -137,7 +137,7 @@ void NetworkUDPSocketHandler::ReceivePac
 
 			/* If the size does not match the packet must be corrupted.
 			 * Otherwise it will be marked as corrupted later on. */
-			if (!p.ParsePacketSize() || nbytes != p.size) {
+			if (!p.ParsePacketSize() || (size_t)nbytes != p.Size()) {
 				DEBUG(net, 1, "received a packet with mismatching size from %s", address.GetAddressAsString().c_str());
 				continue;
 			}