diff --git a/boards/nucleo-l1/include/board.h b/boards/nucleo-l1/include/board.h
index 64f70ee5a6..2e516f4d99 100644
--- a/boards/nucleo-l1/include/board.h
+++ b/boards/nucleo-l1/include/board.h
@@ -7,7 +7,7 @@
  */
 
 /**
- * @defgroup    board_nucleo-l1 nucleo-l1
+ * @defgroup    board_nucleo-l1 Nucleo-L1
  * @ingroup     boards
  * @brief       Board specific files for the nucleo-l1 board.
  * @{
diff --git a/cpu/stm32l1/include/cpu-conf.h b/cpu/stm32l1/include/cpu-conf.h
index 5e9b6b8f1c..b9ec2c6766 100644
--- a/cpu/stm32l1/include/cpu-conf.h
+++ b/cpu/stm32l1/include/cpu-conf.h
@@ -7,9 +7,9 @@
  */
 
 /**
- * @defgroup        cpu_stm32l1 stm32l1
- * @addtogroup      cpu
+ * @defgroup        cpu_stm32l1 STM32L1
  * @brief           CPU specific implementations for the STM32F1
+ * @ingroup         cpu
  * @{
  *
  * @file