diff --git a/tests/unit/utils/vars.c b/tests/unit/utils/vars.c
index 0c6d6ea..73784cf 100644
--- a/tests/unit/utils/vars.c
+++ b/tests/unit/utils/vars.c
@@ -3,6 +3,7 @@
 
 #include <criterion/criterion.h>
 #include <criterion/new/assert.h>
+#include <criterion/redirect.h>
 #include <stdio.h>
 #include <unistd.h>