diff --git a/src/hotspot/share/utilities/ostream.cpp b/src/hotspot/share/utilities/ostream.cpp
index b426f0d549..bf7787554e 100644
--- a/src/hotspot/share/utilities/ostream.cpp
+++ b/src/hotspot/share/utilities/ostream.cpp
@@ -1028,6 +1028,9 @@ bufferedStream::~bufferedStream() {
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #endif
+#if defined(_WINDOWS)
+#include <winsock2.h>
+#endif
 
 // Network access
 networkStream::networkStream() : bufferedStream(1024*10, 1024*10) {