diff --git a/attn/attn_handler.hpp b/attn/attn_handler.hpp
index 256145b..5bfe995 100644
--- a/attn/attn_handler.hpp
+++ b/attn/attn_handler.hpp
@@ -23,6 +23,6 @@
  *
  * @param i_breakpoints true = breakpoint special attn handling enabled
  */
-void attnHandler(bool i_breakpoints);
+void attnHandler(const bool i_breakpoints);
 
 } // namespace attn