diff --git a/src/wakaama-client.cpp b/src/wakaama-client.cpp
index 565a5c4..ea4c4a6 100644
--- a/src/wakaama-client.cpp
+++ b/src/wakaama-client.cpp
@@ -108,7 +108,7 @@ void ArduinoClient::doWorkStep() {
     SerialOut.println(F("parsePacket()"));
     int packetSize = data.udp->parsePacket();
     if (packetSize) {
-        int numBytes = data.udp->read(packetBuffer, UDP_TX_PACKET_MAX_SIZE);
+        int numBytes = data.udp->read(packetBuffer, 512);
 
         connection_t * connP;
         connP = connection_find(data.connList, data.udp);