diff --git a/test/redirect.cc b/test/redirect.cc
index c65c9c1..e71f646 100644
--- a/test/redirect.cc
+++ b/test/redirect.cc
@@ -1,6 +1,7 @@
 #include <criterion/criterion.h>
 #include <criterion/redirect.h>
 #include <iostream>
+#include <string>
 
 // set a timeout for I/O tests
 TestSuite(redirect, .timeout = 0.1);