diff --git a/libraries/Desktop/support/DataFlash_APM1.cpp b/libraries/Desktop/support/DataFlash_APM1.cpp index b45d9d31286b144fa219929b504bf38ce1c878cc..1fb7b5a608a71ad2219a262a4bd523c1f78c10ce 100644 --- a/libraries/Desktop/support/DataFlash_APM1.cpp +++ b/libraries/Desktop/support/DataFlash_APM1.cpp @@ -10,6 +10,7 @@ #include <stdint.h> #include "DataFlash.h" #include <SPI.h> +#include <AP_Semaphore.h> #define DF_PAGE_SIZE 512 #define DF_NUM_PAGES 4096