1 files changed, 1 insertions, 0 deletions

diff --git a/ratio.c b/ratio.c
index 4b5c56b..e23aabd 100644
--- a/ratio.c
+++ b/ratio.c
@@ -3,6 +3,7 @@
 #include <math.h>
 #include <limits.h>
 #include <float.h>
+#include <stdbool.h>
 
 typedef unsigned long long num;