diff --git a/sw/airborne/adc.h b/sw/airborne/adc.h
index 5474cbec57..f2fd997197 100644
--- a/sw/airborne/adc.h
+++ b/sw/airborne/adc.h
@@ -35,6 +35,7 @@
 #define _ADC_H_
 
 #include <inttypes.h>
+#include "adc_hw.h"
 
 /* Allow driver implementation to define 
  * number of available ADCs implicitly