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 860e6b22a9..5cb975ff74 100644
--- a/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/kinetis_emac.cpp
+++ b/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/kinetis_emac.cpp
@@ -80,14 +80,14 @@ Kinetis_EMAC::Kinetis_EMAC() : xTXDCountSem(ENET_TX_RING_LEN, ENET_TX_RING_LEN),
 {
 }
 
-static osThreadId_t create_new_thread(const char *threadName, void (*thread)(void *arg), void *arg, int stacksize, osPriority_t priority, os_thread_t *thread_cb)
+static osThreadId_t create_new_thread(const char *threadName, void (*thread)(void *arg), void *arg, int stacksize, osPriority_t priority, mbed_rtos_storage_thread_t *thread_cb)
 {
     osThreadAttr_t attr = {0};
     attr.name = threadName;
     attr.stack_mem  = malloc(stacksize);
     attr.cb_mem  = thread_cb;
     attr.stack_size = stacksize;
-    attr.cb_size = sizeof(os_thread_t);
+    attr.cb_size = sizeof(mbed_rtos_storage_thread_t);
     attr.priority = priority;
     return osThreadNew(thread, arg, &attr);
 }