diff --git a/examples/platforms/simulation/simul_utils.c b/examples/platforms/simulation/simul_utils.c
index 97bf90e24..4b90bc244 100644
--- a/examples/platforms/simulation/simul_utils.c
+++ b/examples/platforms/simulation/simul_utils.c
@@ -91,6 +91,7 @@ static void InitRxSocket(utilsSocket           *aSocket,
     int fd;
     int one = 1;
     int rval;
+    int rcvBufSize = 2 * 1024 * 1024;
 
     fd = socket(aIp4Address ? AF_INET : AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
     ExpectOrExitWithErrorMsg(fd != -1, "socket(RxFd)");
@@ -101,6 +102,9 @@ static void InitRxSocket(utilsSocket           *aSocket,
     rval = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));
     ExpectOrExitWithErrorMsg(rval != -1, "setsockopt(RxFd, SO_REUSEPORT)");
 
+    rval = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &rcvBufSize, sizeof(rcvBufSize));
+    ExpectOrExitWithErrorMsg(rval != -1, "setsockopt(RxFd, SO_RCVBUF)");
+
     if (aIp4Address)
     {
         struct ip_mreqn     mreq;