diff --git a/config.h b/config.h
index 58ea9d8a..0c41e9f6 100644
--- a/config.h
+++ b/config.h
@@ -528,7 +528,7 @@ NAMESPACE_END
 	#define CRYPTOPP_BOOL_ARM32 0
 #endif
 
-#if defined(__aarch64__)
+#if defined(__arm64__) || defined(__aarch64__) || defined(_M_ARM64)
 	#define CRYPTOPP_BOOL_ARM64 1
 #else
 	#define CRYPTOPP_BOOL_ARM64 0
diff --git a/config.recommend b/config.recommend
index 08caa96d..e0d5df1e 100644
--- a/config.recommend
+++ b/config.recommend
@@ -528,7 +528,7 @@ NAMESPACE_END
 	#define CRYPTOPP_BOOL_ARM32 0
 #endif
 
-#if defined(__aarch64__)
+#if defined(__arm64__) || defined(__aarch64__) || defined(_M_ARM64)
 	#define CRYPTOPP_BOOL_ARM64 1
 #else
 	#define CRYPTOPP_BOOL_ARM64 0