diff --git a/boards/nucleo-l1/include/periph_conf.h b/boards/nucleo-l1/include/periph_conf.h
index 03dfc14740..409a8e1bc7 100644
--- a/boards/nucleo-l1/include/periph_conf.h
+++ b/boards/nucleo-l1/include/periph_conf.h
@@ -80,6 +80,7 @@ static const timer_conf_t timer_config[] = {
  * @{
  */
 #define RTC_NUMOF           (1U)
+/** @} */
 
 /**
  * @brief   UART configuration