diff --git a/drivers/unix/packet_peer_udp_posix.cpp b/drivers/unix/packet_peer_udp_posix.cpp
index 1380c1d88b9..1cb530420ea 100644
--- a/drivers/unix/packet_peer_udp_posix.cpp
+++ b/drivers/unix/packet_peer_udp_posix.cpp
@@ -164,6 +164,7 @@ void PacketPeerUDPPosix::close() {
 		::close(sockfd);
 	sockfd = -1;
 	sock_type = IP::TYPE_NONE;
+	sock_blocking = true;
 	rb.resize(16);
 	queue_count = 0;
 }
diff --git a/drivers/windows/packet_peer_udp_winsock.cpp b/drivers/windows/packet_peer_udp_winsock.cpp
index 66221774b21..f7c3637e7e0 100644
--- a/drivers/windows/packet_peer_udp_winsock.cpp
+++ b/drivers/windows/packet_peer_udp_winsock.cpp
@@ -155,6 +155,7 @@ void PacketPeerUDPWinsock::close() {
 		::closesocket(sockfd);
 	sockfd = -1;
 	sock_type = IP::TYPE_NONE;
+	sock_blocking = true;
 	rb.resize(16);
 	queue_count = 0;
 }