diff --git a/makefile b/makefile
index cd4789d4..05dfdab8 100644
--- a/makefile
+++ b/makefile
@@ -1,5 +1,5 @@
 TARGET = windows
-ARCH = %%Platform%%
+ARCH = $(VSCMD_ARG_TGT_ARCH)
 NAME = matoya
 
 .SUFFIXES : .ps .vs .fragvk .vertvk
@@ -115,6 +115,12 @@ DEFS = $(DEFS) -DMTY_VK_DEBUG
 FLAGS = $(FLAGS) /O2 /GS- /Gw
 !ENDIF
 
+!IFDEF ARM64EC
+FLAGS = $(FLAGS) /arm64EC
+LIB_FLAGS = $(LIB_FLAGS) /MACHINE:arm64ec
+ARCH = arm64ec # ARM64 and ARM64EC are not the same
+!ENDIF
+
 CFLAGS = $(INCLUDES) $(DEFS) $(FLAGS)
 
 all: clean-build clear $(SHADERS) $(OBJS)
diff --git a/test/makefile b/test/makefile
index 9d9198f8..4d294b95 100644
--- a/test/makefile
+++ b/test/makefile
@@ -1,4 +1,4 @@
-ARCH = %%Platform%%
+ARCH = $(VSCMD_ARG_TGT_ARCH)
 
 BIN = \
 	mty.exe
@@ -37,6 +37,10 @@ LIBS = \
 	ws2_32.lib \
 	xinput.lib
 
+!IFDEF ARM64EC
+CFLAGS = $(CFLAGS) /arm64EC
+!ENDIF
+
 test: clean clear
 	cl $(CFLAGS) /Fe:$(BIN) src\$@.c $(LIBS)
 	@mty