diff --git a/rtc_base/system/arch.h b/rtc_base/system/arch.h
index eb77ffa8f4..ed216e660f 100644
--- a/rtc_base/system/arch.h
+++ b/rtc_base/system/arch.h
@@ -23,7 +23,7 @@
 #define WEBRTC_ARCH_X86_64
 #define WEBRTC_ARCH_64_BITS
 #define WEBRTC_ARCH_LITTLE_ENDIAN
-#elif defined(__aarch64__)
+#elif defined(_M_ARM64) || defined(__aarch64__)
 #define WEBRTC_ARCH_ARM_FAMILY
 #define WEBRTC_ARCH_64_BITS
 #define WEBRTC_ARCH_LITTLE_ENDIAN