diff --git a/radio/src/targets/simu/led_driver.cpp b/radio/src/targets/simu/led_driver.cpp
index 6ff57c411..d740ea47a 100644
--- a/radio/src/targets/simu/led_driver.cpp
+++ b/radio/src/targets/simu/led_driver.cpp
@@ -19,8 +19,12 @@
  * GNU General Public License for more details.
  */
 
+#include <stdint.h>
+
 void usbChargerLed() {}
 void ledRed() {}
 void ledGreen() {}
 void ledBlue() {}
 void ledOff() {}
+void fsLedOn(uint8_t) {}
+void fsLedOff(uint8_t) {}