diff --git a/features/netsocket/emac-drivers/TARGET_STM/stm32xx_emac.cpp b/features/netsocket/emac-drivers/TARGET_STM/stm32xx_emac.cpp
index 9d3bfb1cac7..a13e4d124cd 100644
--- a/features/netsocket/emac-drivers/TARGET_STM/stm32xx_emac.cpp
+++ b/features/netsocket/emac-drivers/TARGET_STM/stm32xx_emac.cpp
@@ -82,13 +82,13 @@ ETH_DMADescTypeDef  DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptor
 #pragma location=0x30040400
 uint8_t Rx_Buff[ETH_RX_DESC_CNT][ETH_MAX_PACKET_SIZE]; /* Ethernet Receive Buffers */
 
-#elif defined ( __CC_ARM )  /* MDK ARM Compiler */
+#elif defined ( __CC_ARM )  /* ARMC5 */
 
 __attribute__((section(".RxDecripSection"))) ETH_DMADescTypeDef  DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */
 __attribute__((section(".TxDecripSection"))) ETH_DMADescTypeDef  DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */
-__attribute__((section(".RxArraySection"))) uint8_t Rx_Buff[ETH_RX_DESC_CNT][ETH_RX_BUFFER_SIZE]; /* Ethernet Receive Buffer */
+__attribute__((section(".RxArraySection"))) uint8_t Rx_Buff[ETH_RX_DESC_CNT][ETH_MAX_PACKET_SIZE]; /* Ethernet Receive Buffer */
 
-#elif defined ( __GNUC__ ) /* GNU Compiler */ 
+#elif defined ( __GNUC__ ) /* GCC & ARMC6*/
 
 ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT] __attribute__((section(".RxDecripSection"))); /* Ethernet Rx DMA Descriptors */
 ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT] __attribute__((section(".TxDecripSection")));   /* Ethernet Tx DMA Descriptors */