diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index f51fbfc..6f0b843 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -216,6 +216,9 @@
 !  endif
 ! else  # !CPU
 CPU = i386
+!  if !defined(PLATFORM) && defined(TARGET_CPU)
+PLATFORM = $(TARGET_CPU)
+!  endif
 !  ifdef PLATFORM
 !   if ("$(PLATFORM)" == "x64") || ("$(PLATFORM)" == "X64")
 CPU = AMD64