diff --git a/include/simdjson/arm64.h b/include/simdjson/arm64.h
index b8c33401a..d2c639e27 100644
--- a/include/simdjson/arm64.h
+++ b/include/simdjson/arm64.h
@@ -6,11 +6,11 @@
 #endif
 
 #include "simdjson/portability.h"
-// Default Haswell to on if this is x86-64. Even if we're not compiled for it, it could be selected
-// at runtime.
+
 #ifndef SIMDJSON_IMPLEMENTATION_ARM64
 #define SIMDJSON_IMPLEMENTATION_ARM64 (SIMDJSON_IS_ARM64)
 #endif
+
 #include "simdjson/internal/isadetection.h"
 #include "simdjson/internal/jsoncharutils_tables.h"
 #include "simdjson/internal/numberparsing_tables.h"