diff --git a/include/libopencm3/stm32/common/adc_common_v2_single.h b/include/libopencm3/stm32/common/adc_common_v2_single.h
index 060e03cc..32616cf4 100644
--- a/include/libopencm3/stm32/common/adc_common_v2_single.h
+++ b/include/libopencm3/stm32/common/adc_common_v2_single.h
@@ -68,7 +68,7 @@ specific memorymap.h header before including this header file.*/
 /**@}*/
 
 /* ADC_CHSELR Values --------------------------------------------------------*/
-/** @addtogroup adc_chselr
+/** @defgroup adc_chselr CHSELR ADC Channel Selection register
 @{*/
 #define ADC_CHSELR_CHSEL(x)		(1 << (x))
 /**@}*/
diff --git a/include/libopencm3/stm32/g0/adc.h b/include/libopencm3/stm32/g0/adc.h
index b00c59ca..b40e32b5 100644
--- a/include/libopencm3/stm32/g0/adc.h
+++ b/include/libopencm3/stm32/g0/adc.h
@@ -234,7 +234,7 @@
 
 /**@}*/
 
-/** @addtogroup adc_chselr CHSELR ADC Channel Selection register
+/** @addtogroup adc_chselr
 @{*/
 
 /** ADC_CHSELR_MAX_CHANNELS Maximum number of channel in regular sequence */