diff --git a/hbbytecode/hbbytecode.h b/hbbytecode/hbbytecode.h
index 5694afac2..0dabc8aa3 100644
--- a/hbbytecode/hbbytecode.h
+++ b/hbbytecode/hbbytecode.h
@@ -1,5 +1,8 @@
 /* HoleyBytes Bytecode representation in C
  * Requires C23 compiler or better
+ *
+ * Uses MSVC pack pragma extension,
+ * proved to work with Clang and GNU® GCC™.
  */
 
 #pragma once