--- old/src/java.base/windows/native/libnet/DualStackPlainSocketImpl.c	2015-01-23 13:46:13.737657081 +0000
+++ new/src/java.base/windows/native/libnet/DualStackPlainSocketImpl.c	2015-01-23 13:46:13.585657087 +0000
@@ -48,6 +48,8 @@
     isa_ctorID = (*env)->GetMethodID(env, cls, "<init>",
                                      "(Ljava/net/InetAddress;I)V");
 
+    initInetAddressIDs(env);
+
     // implement read timeout with select.
     isRcvTimeoutSupported = 0;
 }