diff --git a/src/Nazara/Network/Win32/IpAddressImpl.cpp b/src/Nazara/Network/Win32/IpAddressImpl.cpp
index 992b075a9..257e50cf6 100644
--- a/src/Nazara/Network/Win32/IpAddressImpl.cpp
+++ b/src/Nazara/Network/Win32/IpAddressImpl.cpp
@@ -9,6 +9,15 @@
 #include <cstring>
 #include <Nazara/Network/Debug.hpp>
 
+// some MinGW distributions seem to lack some defines
+#ifndef ERROR_NOT_ENOUGH_MEMORY
+#define ERROR_NOT_ENOUGH_MEMORY 8L
+#endif
+
+#ifndef WSA_NOT_ENOUGH_MEMORY
+#define WSA_NOT_ENOUGH_MEMORY (ERROR_NOT_ENOUGH_MEMORY)
+#endif
+
 namespace Nz
 {
 	namespace Detail
diff --git a/src/Nazara/Network/Win32/SocketImpl.cpp b/src/Nazara/Network/Win32/SocketImpl.cpp
index b410af93c..e7af5ff71 100644
--- a/src/Nazara/Network/Win32/SocketImpl.cpp
+++ b/src/Nazara/Network/Win32/SocketImpl.cpp
@@ -8,8 +8,8 @@
 #include <Nazara/Core/MemoryHelper.hpp>
 #include <Nazara/Network/Win32/IpAddressImpl.hpp>
 
-#if defined(NAZARA_COMPILER_MINGW) && __GNUC__ < 5
 // Some compilers (olders versions of MinGW) are lacking Mstcpip.h which defines the following struct/#define
+#if (defined(__has_include) && !__has_include(<Mstcpip.h>)) || (defined(NAZARA_COMPILER_MINGW) && !defined(__has_include))
 struct tcp_keepalive
 {
 	u_long onoff;
diff --git a/src/Nazara/Network/Win32/SocketPollerImpl.cpp b/src/Nazara/Network/Win32/SocketPollerImpl.cpp
index 43dc9fec2..658e86c8e 100644
--- a/src/Nazara/Network/Win32/SocketPollerImpl.cpp
+++ b/src/Nazara/Network/Win32/SocketPollerImpl.cpp
@@ -37,7 +37,7 @@ namespace Nz
 		#if NAZARA_NETWORK_POLL_SUPPORT
 		return m_readyToReadSockets.count(socket) != 0;
 		#else
-		return FD_ISSET(socket, &m_readyToReadSockets) != 0;
+		return FD_ISSET(socket, const_cast<fd_set*>(&m_readyToReadSockets)) != 0; //< FD_ISSET is not const-correct
 		#endif
 	}
 
@@ -46,7 +46,7 @@ namespace Nz
 		#if NAZARA_NETWORK_POLL_SUPPORT
 		return m_readyToWriteSockets.count(socket) != 0;
 		#else
-		return FD_ISSET(socket, &m_readyToWriteSockets) != 0;
+		return FD_ISSET(socket, const_cast<fd_set*>(&m_readyToWriteSockets)) != 0; //< FD_ISSET is not const-correct
 		#endif
 	}
 
@@ -55,8 +55,9 @@ namespace Nz
 		#if NAZARA_NETWORK_POLL_SUPPORT
 		return m_allSockets.count(socket) != 0;
 		#else
-		return FD_ISSET(socket, &m_readSockets) != 0 ||
-		       FD_ISSET(socket, &m_writeSockets) != 0;
+		// FD_ISSET is not const-correct
+		return FD_ISSET(socket, const_cast<fd_set*>(&m_readSockets)) != 0 || 
+		       FD_ISSET(socket, const_cast<fd_set*>(&m_writeSockets)) != 0;
 		#endif
 	}