diff --git a/fifo.c b/fifo.c
index 2296359..71f8434 100644
--- a/fifo.c
+++ b/fifo.c
@@ -1,5 +1,6 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <stdbool.h>
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/stat.h>