diff --git a/include/sta/drivers/MS56xx.hpp b/include/sta/drivers/MS56xx.hpp
index 3452558..7207402 100644
--- a/include/sta/drivers/MS56xx.hpp
+++ b/include/sta/drivers/MS56xx.hpp
@@ -31,7 +31,7 @@ namespace sta
     class MS56xx {
     public:
         /**
-		 * @brief Signature for delay msec function.
+		 * @brief Signature for delay usec function.
 		 */
         using DelayUsFunc = void (*)(uint32_t);