diff --git a/lib/stm32/f1/rtc.c b/lib/stm32/f1/rtc.c
index e32424f4..ec2711ad 100644
--- a/lib/stm32/f1/rtc.c
+++ b/lib/stm32/f1/rtc.c
@@ -241,7 +241,7 @@ uint32_t rtc_get_alarm_val(void)
 /*---------------------------------------------------------------------------*/
 /** @brief RTC set the Counter
 
-@param[in] uint32_t counter_val: 32 bit time setting for the counter.
+@param[in] counter_val 32 bit time setting for the counter.
 */
 
 void rtc_set_counter_val(uint32_t counter_val)