1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/fifo.h b/kernel/fifo.h
index bae7d57..e0a81e5 100644
--- a/kernel/fifo.h
+++ b/kernel/fifo.h
@@ -17,9 +17,9 @@ typedef struct fifo_struct
 
 }fifo;
 
-bool fifo_put(fifo*,uint8_t);
-uint8_t fifo_get(fifo*);
-bool fifo_has(fifo*);
+volatile bool fifo_put(fifo*,uint8_t);
+volatile uint8_t fifo_get(fifo*);
+volatile bool fifo_has(fifo*);
 
 
 #endif