diff --git a/nsis/Make_mvc.mak b/nsis/Make_mvc.mak
index c5aff15..8350082 100644
--- a/nsis/Make_mvc.mak
+++ b/nsis/Make_mvc.mak
@@ -46,6 +46,10 @@
 MKNSISFLAGS = $(MKNSISFLAGS) /DWIN64=$(WIN64)
 !ENDIF
 
+!IFDEF ARM64
+MKNSISFLAGS = $(MKNSISFLAGS) /DARM64=$(ARM64)
+!ENDIF
+
 !IFDEF INCLUDE_LIBGCC
 MKNSISFLAGS = $(MKNSISFLAGS) /DINCLUDE_LIBGCC=$(INCLUDE_LIBGCC)
 !ENDIF