diff --git a/Redirector/EventHandler.cpp b/Redirector/EventHandler.cpp
index 367a657c..ab4605e8 100644
--- a/Redirector/EventHandler.cpp
+++ b/Redirector/EventHandler.cpp
@@ -425,7 +425,7 @@ void udpBeginReceive(ENDPOINT_ID id, SocksHelper::PUDP udpConn, PNF_UDP_OPTIONS
 	{
 		SOCKADDR_IN6 target;
 
-		int length = udpConn->Read(&target, buffer, sizeof(buffer));
+		int length = udpConn->Read(&target, buffer, sizeof(buffer), NULL);
 		if (length == 0 || length == SOCKET_ERROR)
 		{
 			break;
diff --git a/Redirector/SocksHelper.cpp b/Redirector/SocksHelper.cpp
index 2f517904..68b24613 100644
--- a/Redirector/SocksHelper.cpp
+++ b/Redirector/SocksHelper.cpp
@@ -398,7 +398,7 @@ int SocksHelper::UDP::Send(PSOCKADDR_IN6 target, const char* buffer, int length)
 	return length;
 }
 
-int SocksHelper::UDP::Read(PSOCKADDR_IN6 target, char* buffer, int length, PTIMEVAL timeout = NULL)
+int SocksHelper::UDP::Read(PSOCKADDR_IN6 target, char* buffer, int length, PTIMEVAL timeout)
 {
 	if (!this->udpSocket)
 		return SOCKET_ERROR;
@@ -409,7 +409,7 @@ int SocksHelper::UDP::Read(PSOCKADDR_IN6 target, char* buffer, int length, PTIME
 		FD_ZERO(&fds);
 		FD_SET(this->udpSocket, &fds);
 
-		int code = select(this->udpSocket, &fds, NULL, NULL, timeout);
+		int code = select(NULL, &fds, NULL, NULL, timeout);
 		if (code == 0 || code == SOCKET_ERROR)
 			return code;
 	}
diff --git a/Redirector/SocksHelper.h b/Redirector/SocksHelper.h
index c6068720..4e19a3d3 100644
--- a/Redirector/SocksHelper.h
+++ b/Redirector/SocksHelper.h
@@ -34,7 +34,7 @@ namespace SocksHelper
 		bool CreateUDP();
 
 		int Send(PSOCKADDR_IN6 target, const char* buffer, int length);
-		int Read(PSOCKADDR_IN6 target, char* buffer, int length, PTIMEVAL timeout = NULL);
+		int Read(PSOCKADDR_IN6 target, char* buffer, int length, PTIMEVAL timeout);
 
 		SOCKET tcpSocket = INVALID_SOCKET;
 		SOCKET udpSocket = INVALID_SOCKET;