diff --git a/lib/fizzy/stack.hpp b/lib/fizzy/stack.hpp
index e5e526ff1..f451b1dbe 100644
--- a/lib/fizzy/stack.hpp
+++ b/lib/fizzy/stack.hpp
@@ -54,7 +54,7 @@ class Stack
 /// Contains current frame's locals (including arguments) and operand stack.
 /// The storage space for locals and operand stack together is allocated as a
 /// continuous memory. Elements occupy the storage space in the order:
-/// arguments, local variables, operand stack.
+/// arguments, local variables, operand stack. Arguments and local variables can be accessed under a single namespace and are separate from the stack itself.
 class OperandStack
 {
     /// The size of the pre-allocated internal storage: 128 bytes.