--- old/jdk/src/java.base/windows/native/libnio/ch/Net.c	2015-12-16 21:11:24.697735371 +0100
+++ new/jdk/src/java.base/windows/native/libnio/ch/Net.c	2015-12-16 21:11:24.517735368 +0100
@@ -50,6 +50,10 @@
 
 #endif  /* MCAST_BLOCK_SOURCE */
 
+#if _MSC_VER >= 1900
+#pragma warning(disable: 4091) // typedef ignored on left when no variable is declared
+#endif
+
 typedef struct my_ip_mreq_source {
     IN_ADDR imr_multiaddr;
     IN_ADDR imr_sourceaddr;