diff --git a/src/dataflash.c b/src/dataflash.c
index 86317d2..9c4f649 100644
--- a/src/dataflash.c
+++ b/src/dataflash.c
@@ -1,5 +1,6 @@
 #include <avr/io.h>
 #include <stdint.h>
+#include <avr/interrupt.h>
 
 #include "spi.h"
 #include "dataflash.h"
diff --git a/src/spi.c b/src/spi.c
index 9a718f3..485821c 100644
--- a/src/spi.c
+++ b/src/spi.c
@@ -1,5 +1,6 @@
 #include <avr/io.h>
 #include <stdint.h>
+#include <avr/interrupt.h>
 
 #include "spi.h"