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-rw-r--r--kernel/heartbeat.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/heartbeat.c b/kernel/heartbeat.c
index 7540ddc..fb5947a 100644
--- a/kernel/heartbeat.c
+++ b/kernel/heartbeat.c
@@ -16,6 +16,7 @@
*/
#include <stdint.h>
+#include <stdio.h>
#include <avr/io.h>
#include "kernel.h"
#include "tasks.h"