diff --git a/include/libopencm3/stm32/f3/adc.h b/include/libopencm3/stm32/f3/adc.h
index 0e8ef4e1..041562f4 100644
--- a/include/libopencm3/stm32/f3/adc.h
+++ b/include/libopencm3/stm32/f3/adc.h
@@ -37,6 +37,8 @@
 #include <libopencm3/stm32/common/adc_common_v2.h>
 #include <libopencm3/stm32/common/adc_common_v2_multi.h>
 
+/**@{*/
+
 /** @defgroup adc_reg_base ADC register base addresses
 @ingroup STM32xx_adc_defines
 @{*/
@@ -551,5 +553,6 @@ bool adc_awd(uint32_t adc);
 
 END_DECLS
 
+/**@}*/
 
 #endif