diff --git a/lib/util.c b/lib/util.c
index 4a9b499..4e52df4 100644
--- a/lib/util.c
+++ b/lib/util.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <ncurses.h>
 #include <locale.h>
+#include "util.h"
 
 void initialize_curses() {
   setlocale(LC_ALL, "en_US.utf-8");  /* supporting unicode characters          */