diff --git a/os/hal/platforms/STM32/mac_lld.h b/os/hal/platforms/STM32/mac_lld.h
index 1cb28f79c..32ef3ba79 100644
--- a/os/hal/platforms/STM32/mac_lld.h
+++ b/os/hal/platforms/STM32/mac_lld.h
@@ -123,21 +123,21 @@
 /**
  * @brief   Number of available transmit buffers.
  */
-#if !defined(MAC_TRANSMIT_BUFFERS) || defined(__DOXYGEN__)
+#if !defined(STM32_MAC_TRANSMIT_BUFFERS) || defined(__DOXYGEN__)
 #define STM32_MAC_TRANSMIT_BUFFERS  2
 #endif
 
 /**
  * @brief   Number of available receive buffers.
  */
-#if !defined(MAC_RECEIVE_BUFFERS) || defined(__DOXYGEN__)
+#if !defined(STM32_MAC_RECEIVE_BUFFERS) || defined(__DOXYGEN__)
 #define STM32_MAC_RECEIVE_BUFFERS   4
 #endif
 
 /**
  * @brief   Maximum supported frame size.
  */
-#if !defined(MAC_BUFFERS_SIZE) || defined(__DOXYGEN__)
+#if !defined(STM32_MAC_BUFFERS_SIZE) || defined(__DOXYGEN__)
 #define STM32_MAC_BUFFERS_SIZE      1522
 #endif
 
diff --git a/readme.txt b/readme.txt
index 9a5f075c2..9f958c8b7 100644
--- a/readme.txt
+++ b/readme.txt
@@ -79,6 +79,8 @@
 *****************************************************************************
 
 *** 2.5.0 ***
+- FIX: Fixed wrong macro check in STM32 MAC driver (bug 3527179 )(backported
+  to 2.4.2).
 - FIX: Fixed error in STM32L-Discovery board.h file (bug 3526918)(backported
   to 2.4.2).
 - FIX: Fixed inconsistent LPCxxx Internal RC oscillator names (bug 3524138)