As explained in the documentation cant be included multiple times.

diff --git a/applications/jpip/libopenjpip/sock_manager.h b/applications/jpip/libopenjpip/sock_manager.h
index 3014f6c38be753166d5597885dd977c21d7e349c..652865424e6d4f7281dcc52cac21caafd2666d0e 100644 (file)
--- a/applications/jpip/libopenjpip/sock_manager.h
+++ b/applications/jpip/libopenjpip/sock_manager.h
@@ -35,7 +35,7 @@
 #include "byte_manager.h"
 
 #ifdef _WIN32
-#include <winsock2.h>
+#include <winsock.h>
 #else
 typedef int SOCKET;
 #endif /*_WIN32*/