diff --git a/configure/os/CONFIG.windows-x64.Common b/configure/os/CONFIG.windows-x64.Common
new file mode 100644
index 000000000..0a8463626
--- /dev/null
+++ b/configure/os/CONFIG.windows-x64.Common
@@ -0,0 +1,13 @@
+# CONFIG.win-x86_64.Common
+#
+# $Id$
+# This file is maintained by the build community.
+#
+# Definitions for win-x86_64 host archs
+# Sites may override these definitions in CONFIG_SITE.win-x86_64.Common
+#-------------------------------------------------------
+
+-include $(CONFIG)/os/CONFIG.win32-x86.Common
+
+WIND_HOST_TYPE = x86_64-win
+
diff --git a/configure/os/CONFIG.windows-x64.windows-x64 b/configure/os/CONFIG.windows-x64.windows-x64
new file mode 100644
index 000000000..385bbeab4
--- /dev/null
+++ b/configure/os/CONFIG.windows-x64.windows-x64
@@ -0,0 +1,20 @@
+# CONFIG.win-x86_64.win-x86_64
+#
+# $Id$
+# This file is maintained by the build community.
+#
+# Definitions for win-x86_64 target archs when host arch is win-x86_64
+# Sites may override these definitions in CONFIG_SITE.win-x86_64.win-x86_64
+#-------------------------------------------------------
+
+-include $(CONFIG)/os/CONFIG.win32-x86.win32-x86
+
+#-------------------------------------------------------
+
+
+STATIC_LDLIBS_YES=ws2_64.lib advapi64.lib user64.lib kernel64.lib winmm.lib
+
+WIN_DLLFLAGS = /subsystem:windows /dll $(OPT_LDFLAGS) $(TARGET_LDFLAGS) $(LIB_LDFLAGS)
+
+LINK.shrlib = $(WINLINK) /nologo $(WIN_DLLFLAGS) /implib:$*.lib /out:$*.dll $(DLL_DEF_FLAG)
+