diff --git a/src/include/lwip/memp.h b/src/include/lwip/memp.h
index 562cd05b..83a27e6e 100644
--- a/src/include/lwip/memp.h
+++ b/src/include/lwip/memp.h
@@ -90,7 +90,7 @@ extern const struct memp_desc* const memp_pools[MEMP_MAX];
  *   - free: LWIP_MEMPOOL_FREE(my_private_pool, my_new_mem);
  *
  * To relocate a pool, declare it as extern in cc.h. Example for GCC:
- *   extern u8_t __attribute__((section(".onchip_mem"))) memp_memory_my_private_pool[];
+ *   extern u8_t \_\_attribute\_\_((section(".onchip_mem"))) memp_memory_my_private_pool[];
  */
 #define LWIP_MEMPOOL_DECLARE(name,num,size,desc) \
   LWIP_DECLARE_MEMORY_ALIGNED(memp_memory_ ## name ## _base, ((num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size)))); \
diff --git a/src/include/lwip/opt.h b/src/include/lwip/opt.h
index 2c3a8b70..430ef62e 100644
--- a/src/include/lwip/opt.h
+++ b/src/include/lwip/opt.h
@@ -2897,7 +2897,7 @@
  * - option: option value (u8_t)
  * - len: option data length (u8_t)
  * - pbuf: pbuf where option data is contained
- * - option_value_offset: offset in pbuf where option *data* begins
+ * - option_value_offset: offset in pbuf where option data begins
  *
  * A nice way to get the option contents is pbuf_get_contiguous():
  *  u8_t buf[32];
diff --git a/src/netif/ethernet.c b/src/netif/ethernet.c
index 65bcdc90..fb259c3c 100644
--- a/src/netif/ethernet.c
+++ b/src/netif/ethernet.c
@@ -261,7 +261,7 @@ free_and_return:
  * @param p the packet to send. pbuf layer must be @ref PBUF_LINK.
  * @param src the source MAC address to be copied into the ethernet header
  * @param dst the destination MAC address to be copied into the ethernet header
- * @param eth_type ethernet type (@ref eth_type)
+ * @param eth_type ethernet type (@ref lwip_ieee_eth_type)
  * @return ERR_OK if the packet was sent, any other err_t on failure
  */
 err_t