diff --git a/tests/test_util.cpp b/tests/test_util.cpp
index 535bdc8..8a905ed 100644
--- a/tests/test_util.cpp
+++ b/tests/test_util.cpp
@@ -1,6 +1,7 @@
 #include "test_util.h"
 
 #include <algorithm>
+#include <cstring>
 
 namespace mimir_tests {