diff --git a/cpu/esp32/doc.txt b/cpu/esp32/doc.txt
index ceaf0c3280..3a4df53cf3 100644
--- a/cpu/esp32/doc.txt
+++ b/cpu/esp32/doc.txt
@@ -1401,11 +1401,11 @@ Furthermore, the following configuration parameters have to be defined:
 
 <center>
 
-Parameter          | Default                   | Description
-:------------------|:--------------------------|:------------
-ESP_WIFI_SSID      | "RIOT_AP"                 | SSID of the AP to be used.
-ESP_WIFI_PASS      | -                         | Passphrase used for the AP as clear text (max. 64 chars).
-ESP_WIFI_STACKSIZE | #THREAD_STACKSIZE_DEFAULT | Stack size used for the WiFi netdev driver thread.
+Parameter           | Default                   | Description
+:-------------------|:--------------------------|:------------
+#ESP_WIFI_SSID      | "RIOT_AP"                 | SSID of the AP to be used.
+#ESP_WIFI_PASS      | -                         | Passphrase used for the AP as clear text (max. 64 chars).
+#ESP_WIFI_STACKSIZE | #THREAD_STACKSIZE_DEFAULT | Stack size used for the WiFi netdev driver thread.
 
 </center>
 
@@ -1452,15 +1452,19 @@ following configuration parameters have to be defined:
 
 <center>
 
-Parameter          | Default   | Description
-:------------------|:----------|:------------
-ESP_WIFI_SSID      | "RIOT_AP" | SSID of the AP to be used.
-ESP_WIFI_EAP_ID    | none      | Optional anonymous identity used in phase 1 (outer) EAP authentication. If it is not defined, the user name defined for phase 2 (inner) EAP authentication is used as identity in phase 1.
-ESP_WIFI_EAP_USER  | none      | User name used in phase 2 (inner) EAP authentication.
-ESP_WIFI_EAP_PASS  | none      | Password used in phase 2 (inner) EAP authentication.
-ESP_WIFI_STACKSIZE | #THREAD_STACKSIZE_DEFAULT | Stack size used for the WiFi netdev driver thread.
+Parameter           | Default   | Description
+:-------------------|:----------|:------------
+#ESP_WIFI_SSID      | "RIOT_AP" | SSID of the AP to be used.
+ESP_WIFI_EAP_ID     | none      | Optional anonymous identity used in phase 1 (outer) EAP authentication.[1]
+ESP_WIFI_EAP_USER   | none      | User name used in phase 2 (inner) EAP authentication.
+ESP_WIFI_EAP_PASS   | none      | Password used in phase 2 (inner) EAP authentication.
+#ESP_WIFI_STACKSIZE | #THREAD_STACKSIZE_DEFAULT | Stack size used for the WiFi netdev driver thread.
 
-</center>
+</center><br>
+
+[1] If the optional anonymous identy `ESP_WIFI_EAP_ID` is not defined, the user
+name `ESP_WIFI_EAP_USER` defined for phase 2 (inner) EAP authentication is used
+as identity in phase 1.
 
 These configuration parameter definitions, as well as enabling the `esp_wifi`
 module, can be done either in the makefile of the project or at make command