diff --git a/stm-firmware/include/stm-periph/stm32-gpio-macros.h b/stm-firmware/include/stm-periph/stm32-gpio-macros.h
index 438ba03..2ceec81 100644
--- a/stm-firmware/include/stm-periph/stm32-gpio-macros.h
+++ b/stm-firmware/include/stm-periph/stm32-gpio-macros.h
@@ -22,6 +22,7 @@
 #define __STM32GPIOMACROS_H__
 
 #define MODER_DELETE(pin) ~(0x3U << (pin * 2))
+#define PUPDR_DELETE(pin) ~(0x3U << (pin * 2))
 #define OUTPUT(pin)  (0x01U << (pin * 2))
 #define PULLUP(pin) (0x1U << (pin* 2))
 #define ALTFUNC(pin) ((0x2) << (pin * 2))