diff --git a/tools/mbspc/qcommon/q_platform.h b/tools/mbspc/qcommon/q_platform.h
index d3b3b6b0..a11b0198 100644
--- a/tools/mbspc/qcommon/q_platform.h
+++ b/tools/mbspc/qcommon/q_platform.h
@@ -156,6 +156,9 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #define idx64 1
 #define ARCH_STRING "x86_64"
 #define Q3_LITTLE_ENDIAN
+#elif defined __aarch64__
+#define ARCH_STRING "arm64"
+#define Q3_LITTLE_ENDIAN
 #endif
 
 #define DLL_EXT ".dylib"