diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index 86ecfc88fd..4e7674cfd9 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -335,6 +335,7 @@ COROUTINE_SRC = $(COROUTINE_OBJ:.obj=.asm)
 !elseif "$(ARCH)" == "i386"
 COROUTINE_OBJ = coroutine/win32/Context.obj
 COROUTINE_SRC = $(COROUTINE_OBJ:.obj=.asm)
+!elseif "$(ARCH)" == "arm64"
 !else
 !error copy coroutine has been replaced with pthread implementation at 42130a64f02294dc8025af3a51bda518c67ab33d
 !endif
diff --git a/win32/setup.mak b/win32/setup.mak
index 8a23f9afab..275ccda3bb 100644
--- a/win32/setup.mak
+++ b/win32/setup.mak
@@ -201,7 +201,9 @@ del %0 & exit
 
 -generic-: nul
 	@$(CPP) <<conftest.c 2>nul | findstr = >>$(MAKEFILE)
-#if defined _M_X64
+#if defined _M_ARM64
+MACHINE = arm64
+#elif defined _M_X64
 MACHINE = x64
 #else
 MACHINE = x86
@@ -217,6 +219,8 @@ MACHINE = x86
 	@echo MACHINE = x64>>$(MAKEFILE)
 -ix86-: -osname32-
 	@echo MACHINE = x86>>$(MAKEFILE)
+-arm64-: -osname64-
+	@echo MACHINE = arm64>>$(MAKEFILE)
 
 -i386-: -ix86-
 	@echo $(CPU) = 3>>$(MAKEFILE)