diff --git a/subsystems/subsystems.rbuild b/subsystems/subsystems.rbuild
index 49a9029d4da..3bbdd8c4034 100644
--- a/subsystems/subsystems.rbuild
+++ b/subsystems/subsystems.rbuild
@@ -1,9 +1,11 @@
 <?xml version="1.0"?>
 <!DOCTYPE group SYSTEM "../tools/rbuild/project.dtd">
 <group xmlns:xi="http://www.w3.org/2001/XInclude">
+	<if property="ARCH" value="i386">
 <directory name="ntvdm">
 	<xi:include href="ntvdm/ntvdm.rbuild" />
 </directory>
+	</if>
 <directory name="win32">
 	<xi:include href="win32/win32.rbuild" />
 </directory>