diff --git a/components/esp_eth/src/esp_eth_mac_w5500.c b/components/esp_eth/src/esp_eth_mac_w5500.c
index 48123fdd81..a2a2794c31 100644
--- a/components/esp_eth/src/esp_eth_mac_w5500.c
+++ b/components/esp_eth/src/esp_eth_mac_w5500.c
@@ -470,7 +470,7 @@ static esp_err_t emac_w5500_transmit(esp_eth_mac_t *mac, uint8_t *buf, uint32_t
     // check if there're free memory to store this packet
     uint16_t free_size = 0;
     ESP_GOTO_ON_ERROR(w5500_get_tx_free_size(emac, &free_size), err, TAG, "get free size failed");
-    ESP_GOTO_ON_FALSE(length <= free_size, ESP_ERR_NO_MEM, err, TAG, "free size (%d) < send length (%d)", length, free_size);
+    ESP_GOTO_ON_FALSE(length <= free_size, ESP_ERR_NO_MEM, err, TAG, "free size (%d) < send length (%d)", free_size, length);
     // get current write pointer
     ESP_GOTO_ON_ERROR(w5500_read(emac, W5500_REG_SOCK_TX_WR(0), &offset, sizeof(offset)), err, TAG, "read TX WR failed");
     offset = __builtin_bswap16(offset);