diff --git a/src/google/protobuf/stubs/platform_macros.h b/src/google/protobuf/stubs/platform_macros.h
index b1df60e467..8abfd0c7fc 100644
--- a/src/google/protobuf/stubs/platform_macros.h
+++ b/src/google/protobuf/stubs/platform_macros.h
@@ -49,6 +49,9 @@
 #elif defined(__ARMEL__)
 #define GOOGLE_PROTOBUF_ARCH_ARM 1
 #define GOOGLE_PROTOBUF_ARCH_32_BIT 1
+#elif defined(__aarch64__)
+#define GOOGLE_PROTOBUF_ARCH_AARCH64 1
+#define GOOGLE_PROTOBUF_ARCH_64_BIT 1
 #elif defined(__MIPSEL__)
 #define GOOGLE_PROTOBUF_ARCH_MIPS 1
 #define GOOGLE_PROTOBUF_ARCH_32_BIT 1