diff --git a/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/kinetis_emac.cpp b/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/kinetis_emac.cpp
index 46bb3a2f3a..c091e0b8e9 100644
--- a/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/kinetis_emac.cpp
+++ b/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/kinetis_emac.cpp
@@ -55,7 +55,7 @@ uint8_t *rx_desc_start_addr;
 // RX packet buffer pointers
 emac_mem_buf_t *rx_buff[ENET_RX_RING_LEN];
 // TX packet buffer pointers
-emac_mem_buf_t *tx_buff[ENET_RX_RING_LEN];
+emac_mem_buf_t *tx_buff[ENET_TX_RING_LEN];
 // RX packet payload pointers
 uint32_t *rx_ptr[ENET_RX_RING_LEN];
 
diff --git a/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/kinetis_emac_config.h b/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/kinetis_emac_config.h
index 570e5f6c5b..a56fe41942 100644
--- a/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/kinetis_emac_config.h
+++ b/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/kinetis_emac_config.h
@@ -32,8 +32,8 @@
 
 #include "fsl_enet.h"
 
-#define ENET_RX_RING_LEN              (16)
-#define ENET_TX_RING_LEN              (8)
+#define ENET_RX_RING_LEN              MBED_CONF_KINETIS_EMAC_RX_RING_LEN
+#define ENET_TX_RING_LEN              MBED_CONF_KINETIS_EMAC_TX_RING_LEN
 
 #define ENET_ETH_MAX_FLEN             (1522) // recommended size for a VLAN frame
 
diff --git a/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/mbed_lib.json b/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/mbed_lib.json
new file mode 100644
index 0000000000..2e1ef2e320
--- /dev/null
+++ b/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/mbed_lib.json
@@ -0,0 +1,7 @@
+{
+    "name": "kinetis-emac",
+    "config": {
+        "rx-ring-len": 16,
+        "tx-ring-len": 8
+    }
+}