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-rw-r--r--nt/inc/sys/socket.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/nt/inc/sys/socket.h b/nt/inc/sys/socket.h
index 2582cbdaef1..de282c467e6 100644
--- a/nt/inc/sys/socket.h
+++ b/nt/inc/sys/socket.h
@@ -49,6 +49,11 @@ along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
#define timeval ws_timeval
#endif
+#if defined __MINGW32_VERSION && __MINGW32_VERSION >= 5000002L
+/* Need winerror.h before winsock2.h with mingw.org's MinGW 5.x,
+ otherwise some error codes are not defined. */
+# include <winerror.h>
+#endif
#include <winsock2.h>
#include <ws2tcpip.h>
/* process.c uses uint16_t (from C99) for IPv6, but