diff --git a/include/libopencm3/stm32/common/gpio_common_f234.h b/include/libopencm3/stm32/common/gpio_common_f234.h
index 5fb03ae8..8bfe0ab0 100644
--- a/include/libopencm3/stm32/common/gpio_common_f234.h
+++ b/include/libopencm3/stm32/common/gpio_common_f234.h
@@ -163,10 +163,10 @@ specific memorymap.h header before including this header file.*/
 
 /** @defgroup gpio_output_type GPIO Output Pin Driver Type
 @ingroup gpio_defines
-@list Push Pull
-@list Open Drain
 @{*/
+/** Push Pull */
 #define GPIO_OTYPE_PP			0x0
+/** Open Drain */
 #define GPIO_OTYPE_OD			0x1
 /**@}*/