diff --git a/firmware/hw_layer/digital_input_exti.h b/firmware/hw_layer/digital_input_exti.h
index d397858a51..42b980de6a 100644
--- a/firmware/hw_layer/digital_input_exti.h
+++ b/firmware/hw_layer/digital_input_exti.h
@@ -10,7 +10,9 @@
 
 #include "global.h"
 
+#if HAL_USE_EXT || defined(__DOXYGEN__)
 void enableExti(brain_pin_e pin, uint32_t mode, extcallback_t cb);
 void myExtStart(void);
+#endif
 
 #endif /* HW_LAYER_DIGITAL_INPUT_EXTI_H_ */