diff --git a/include/boost/predef/architecture/arm.h b/include/boost/predef/architecture/arm.h
index 96f89c8..8b10b40 100644
--- a/include/boost/predef/architecture/arm.h
+++ b/include/boost/predef/architecture/arm.h
@@ -28,6 +28,7 @@ http://www.boost.org/LICENSE_1_0.txt)
     [[`__TARGET_ARCH_THUMB`] [__predef_detection__]]
     [[`_M_ARM`] [__predef_detection__]]
     [[`_M_ARM64`] [__predef_detection__]]
+    [[`__aarch64__`] [__predef_detection__]]
 
     [[`__arm64`] [8.0.0]]
     [[`__TARGET_ARCH_ARM`] [V.0.0]]
@@ -35,6 +36,7 @@ http://www.boost.org/LICENSE_1_0.txt)
     [[`__ARM_ARCH`] [V.0.0]]
     [[`_M_ARM`] [V.0.0]]
     [[`_M_ARM64`] [8.0.0]]
+    [[`__aarch64__`] [8.0.0]]
     ]
  */
 
@@ -43,7 +45,8 @@ http://www.boost.org/LICENSE_1_0.txt)
 #if defined(__arm__) || defined(__arm64) || defined(__thumb__) || \
     defined(__TARGET_ARCH_ARM) || defined(__TARGET_ARCH_THUMB) || \
     defined(__ARM_ARCH) || \
-    defined(_M_ARM) || defined(_M_ARM64)
+    defined(_M_ARM) || defined(_M_ARM64) || \
+    defined(__aarch64__)
 #   undef BOOST_ARCH_ARM
 #   if !defined(BOOST_ARCH_ARM) && defined(__arm64)
 #       define BOOST_ARCH_ARM BOOST_VERSION_NUMBER(8,0,0)
@@ -63,6 +66,9 @@ http://www.boost.org/LICENSE_1_0.txt)
 #   if !defined(BOOST_ARCH_ARM) && defined(_M_ARM)
 #       define BOOST_ARCH_ARM BOOST_VERSION_NUMBER(_M_ARM,0,0)
 #   endif
+#   if !defined(BOOST_ARCH_ARM) && defined(__aarch64__)
+#       define BOOST_ARCH_ARM BOOST_VERSION_NUMBER(8,0,0)
+#   endif
 #   if !defined(BOOST_ARCH_ARM)
 #       define BOOST_ARCH_ARM BOOST_VERSION_NUMBER_AVAILABLE
 #   endif