Index: /trunk/Config.kmk
===================================================================
--- /trunk/Config.kmk	(revision 48323)
+++ /trunk/Config.kmk	(revision 48324)
@@ -510,5 +510,5 @@
 VBOX_WITH_MAIN = 1
 # Whether to also ship 32-bit main API on 64-bit systems.
-if1of ($(KBUILD_TARGET).$(KBUILD_TARGET_ARCH), solaris.amd64)
+if1of ($(KBUILD_TARGET).$(KBUILD_TARGET_ARCH), solaris.amd64 win.amd64)
  VBOX_WITH_32_ON_64_MAIN_API = 1
 endif