diff --git a/src/main.c b/src/main.c
index 1f72925..27a06a3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -20,6 +20,7 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include "gotty/options.h"
 #include "gotty/tty.h"