--- ./mmg-sources/src/common/mmgcommon.h.in-origine	2020-04-03 09:59:45.000000000 +0200
+++ ./mmg-sources/src/common/mmgcommon.h.in	2020-04-03 10:00:23.000000000 +0200
@@ -43,6 +43,7 @@
 #elif defined(__unix__) || defined(__unix) || defined(unix)
 #include <unistd.h>
 #elif defined(_WIN16) || defined(_WIN32) || defined(_WIN64) || defined(__WIN32__) || defined(__TOS_WIN__) || defined(__WINDOWS__)
+#undef POSIX 
 #ifndef GNU
 #define _WIN32_WINNT 0x0500
 #endif
