diff --git a/src/mq303a/mq303a.h b/src/mq303a/mq303a.h index 4c1aabaa..976fcbaa 100644 --- a/src/mq303a/mq303a.h +++ b/src/mq303a/mq303a.h @@ -27,6 +27,7 @@ #include "upm.h" #include "mraa/aio.h" +#include "mraa/gpio.h" /** * @brief MQ303A Alcohol Sensor library