diff --git a/src/main/drivers/gpio_stm32f30x.c b/src/main/drivers/gpio_stm32f30x.c
index 8dd9d50324..279f1acee3 100644
--- a/src/main/drivers/gpio_stm32f30x.c
+++ b/src/main/drivers/gpio_stm32f30x.c
@@ -72,8 +72,5 @@ void gpioInit(GPIO_TypeDef *gpio, gpio_config_t *config)
 
 void gpioExtiLineConfig(uint8_t portsrc, uint8_t pinsrc)
 {
-    UNUSED(portsrc);
-    UNUSED(pinsrc);
-
-    // FIXME needed yet? implement?
+    SYSCFG_EXTILineConfig(portsrc, pinsrc);
 }