diff --git a/litex/tools/remote/comm_udp.py b/litex/tools/remote/comm_udp.py
index 2e30ba1fa..6e1dae0a8 100644
--- a/litex/tools/remote/comm_udp.py
+++ b/litex/tools/remote/comm_udp.py
@@ -42,6 +42,7 @@ class CommUDP(CSRBuilder):
             packet = EtherbonePacket()
             packet.pf = 1
             packet.encode()
+            packet.bytes += bytes([0x00, 0x00, 0x00, 0x00]) # Add Padding as payload.
             self.socket.sendto(packet.bytes, (ip, port))
 
             # ...and get/check server's response.