diff --git a/software/raspberry/superviseur-robot/lib/src/server.cpp b/software/raspberry/superviseur-robot/lib/src/server.cpp
index 6b9b78d..85b65a4 100644
--- a/software/raspberry/superviseur-robot/lib/src/server.cpp
+++ b/software/raspberry/superviseur-robot/lib/src/server.cpp
@@ -28,7 +28,7 @@ int clientID = -1;
 
 int socketUDP= -1;
 struct sockaddr_in UDPcliaddr;
-int UDPcliaddrlen = -1;
+socklen_t UDPcliaddrlen = -1;
 char *UDPBuffer=0;
 
 int openServer(int port) {