diff --git a/lib/rtc_dcf77.c b/lib/rtc_dcf77.c
index 61d2c5f..54bf22b 100644
--- a/lib/rtc_dcf77.c
+++ b/lib/rtc_dcf77.c
@@ -40,7 +40,7 @@ volatile uint64_t rtc_dcf77_frame = 0; /**< the received DCF77 frame bits */
 void rtc_dcf77_setup(void)
 {
 	// setup enable output
-	rcc_periph_clock_enable(RTC_DCF77_ENABLE_RCC); // enable clock GPIO peripherial
+	rcc_periph_clock_enable(RTC_DCF77_ENABLE_RCC); // enable clock GPIO peripheral
 	gpio_set_mode(RTC_DCF77_ENABLE_PORT, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, RTC_DCF77_ENABLE_PIN); // set pin to output push-pull to be able to enable the module
 	rtc_dcf77_off(); // disable module at start