diff --git a/tests/check_utils.c b/tests/check_utils.c
index 7229e4b..a422af4 100644
--- a/tests/check_utils.c
+++ b/tests/check_utils.c
@@ -1,3 +1,4 @@
+#include "../config.h"
 #include <stdlib.h>
 
 #include "../src/tailor.h"