diff --git a/os/hal/platforms/AT91SAM7/serial_lld.c b/os/hal/platforms/AT91SAM7/serial_lld.c
index 47de0a0e6..df57e5ed4 100644
--- a/os/hal/platforms/AT91SAM7/serial_lld.c
+++ b/os/hal/platforms/AT91SAM7/serial_lld.c
@@ -151,7 +151,7 @@ static void set_error(SerialDriver *sdp, AT91_REG csr) {
   chSysUnlockFromIsr();
 }
 
-#if defined(__GNU__)
+#if defined(__GNUC__)
 __attribute__((noinline))
 #endif
 #if !USE_SAM7_DBGU_UART
diff --git a/os/hal/platforms/LPC214x/serial_lld.c b/os/hal/platforms/LPC214x/serial_lld.c
index a1db8c537..cec8f5c7a 100644
--- a/os/hal/platforms/LPC214x/serial_lld.c
+++ b/os/hal/platforms/LPC214x/serial_lld.c
@@ -120,7 +120,7 @@ static void set_error(SerialDriver *sdp, IOREG32 err) {
   chSysUnlockFromIsr();
 }
 
-#if defined(__GNU__)
+#if defined(__GNUC__)
 __attribute__((noinline))
 #endif
 /**
@@ -128,7 +128,6 @@ __attribute__((noinline))
  * @note    Tries hard to clear all the pending interrupt sources, we dont want
  *          to go through the whole ISR and have another interrupt soon after.
  *
- * @param[in] u         pointer to an UART I/O block
  * @param[in] sdp       communication channel associated to the UART
  */
 static void serve_interrupt(SerialDriver *sdp) {
diff --git a/readme.txt b/readme.txt
index b03872d05..7c83635bd 100644
--- a/readme.txt
+++ b/readme.txt
@@ -63,6 +63,8 @@
 *****************************************************************************
 
 *** 2.1.2 ***
+- FIX: Fixed wrong macro check in LPC214x and AT91SAM7 serial drivers (bug
+  3088776)(backported to 2.0.6).
 - FIX: Fixed non functioning option SPI_USE_MUTUAL_EXCLUSION=FALSE (bug
   3084764)(backported to 2.0.6).
 - FIX: Fixed wrong macro check in STM32 serial support (bug 3078891)(backported