diff --git a/boards/esp8266-esp-12x/include/board.h b/boards/esp8266-esp-12x/include/board.h
index eafc405183..1ab77c25fe 100644
--- a/boards/esp8266-esp-12x/include/board.h
+++ b/boards/esp8266-esp-12x/include/board.h
@@ -7,8 +7,7 @@
  */
 
 /**
- * @defgroup    boards_esp8266_esp-12x  ESP-12x based boards
- * @ingroup     boards_esp8266
+ * @ingroup     boards_esp8266_esp-12x
  */
 
 /**
diff --git a/boards/esp8266-olimex-mod/include/board.h b/boards/esp8266-olimex-mod/include/board.h
index 20c0e53527..38e540409e 100644
--- a/boards/esp8266-olimex-mod/include/board.h
+++ b/boards/esp8266-olimex-mod/include/board.h
@@ -7,8 +7,7 @@
  */
 
 /**
- * @defgroup    boards_esp8266_olimex-mod Olimex MOD-WIFI-ESP8266-DEV
- * @ingroup     boards_esp8266
+ * @ingroup     boards_esp8266_olimex-mod
  */
 
 /**
diff --git a/boards/esp8266-sparkfun-thing/include/board.h b/boards/esp8266-sparkfun-thing/include/board.h
index 7f80ced168..e40f67ac7a 100644
--- a/boards/esp8266-sparkfun-thing/include/board.h
+++ b/boards/esp8266-sparkfun-thing/include/board.h
@@ -7,8 +7,7 @@
  */
 
 /**
- * @defgroup    boards_esp8266_sparkfun-thing SparkFun ESP8266 Thing
- * @ingroup     boards_esp8266
+ * @ingroup     boards_esp8266_sparkfun-thing
  */
 
 /**