diff --git a/src/platforms/common/blackpill-f4/blackpill-f4.c b/src/platforms/common/blackpill-f4/blackpill-f4.c
index db3433143d1..225f6d830b2 100644
--- a/src/platforms/common/blackpill-f4/blackpill-f4.c
+++ b/src/platforms/common/blackpill-f4/blackpill-f4.c
@@ -51,10 +51,10 @@ void platform_init(void)
 
 #ifndef BMP_BOOTLOADER
 	/* Blackpill board has a floating button on PA0. Pull it up and use as active-low. */
-	gpio_mode_setup(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_PULLUP, GPIO0);
+	gpio_mode_setup(USER_BUTTON_KEY_PORT, GPIO_MODE_INPUT, GPIO_PUPD_PULLUP, USER_BUTTON_KEY_PIN);
 
 	/* Check the USER button */
-	if (!gpio_get(GPIOA, GPIO0) || (magic[0] == BOOTMAGIC0 && magic[1] == BOOTMAGIC1)) {
+	if (!gpio_get(USER_BUTTON_KEY_PORT, USER_BUTTON_KEY_PIN) || (magic[0] == BOOTMAGIC0 && magic[1] == BOOTMAGIC1)) {
 		magic[0] = 0;
 		magic[1] = 0;
 		/* Assert blue LED as indicator we are in the bootloader */
diff --git a/src/platforms/common/blackpill-f4/blackpill-f4.h b/src/platforms/common/blackpill-f4/blackpill-f4.h
index 649b6d83a63..137430df9cf 100644
--- a/src/platforms/common/blackpill-f4/blackpill-f4.h
+++ b/src/platforms/common/blackpill-f4/blackpill-f4.h
@@ -103,6 +103,9 @@
 #define PWR_BR_PORT PINOUT_SWITCH(GPIOA, GPIOB)
 #define PWR_BR_PIN  PINOUT_SWITCH(GPIO1, GPIO9)
 
+#define USER_BUTTON_KEY_PORT GPIOA
+#define USER_BUTTON_KEY_PIN  GPIO0
+
 #define LED_PORT       GPIOC
 #define LED_IDLE_RUN   GPIO13
 #define LED_ERROR      GPIO14
diff --git a/src/platforms/common/blackpill-f4/usbdfu.c b/src/platforms/common/blackpill-f4/usbdfu.c
index a116e41e904..b32afce068d 100644
--- a/src/platforms/common/blackpill-f4/usbdfu.c
+++ b/src/platforms/common/blackpill-f4/usbdfu.c
@@ -41,9 +41,9 @@ int main(void)
 	rcc_periph_clock_enable(RCC_GPIOA);
 
 	/* Blackpill board has a floating button on PA0. Pull it up and use as active-low. */
-	gpio_mode_setup(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_PULLUP, GPIO0);
+	gpio_mode_setup(USER_BUTTON_KEY_PORT, GPIO_MODE_INPUT, GPIO_PUPD_PULLUP, USER_BUTTON_KEY_PIN);
 
-	if (!gpio_get(GPIOA, GPIO0) || (magic[0] == BOOTMAGIC0 && magic[1] == BOOTMAGIC1)) {
+	if (!gpio_get(USER_BUTTON_KEY_PORT, USER_BUTTON_KEY_PIN) || (magic[0] == BOOTMAGIC0 && magic[1] == BOOTMAGIC1)) {
 		magic[0] = 0;
 		magic[1] = 0;
 	} else