diff --git a/tests/test-utils.c b/tests/test-utils.c
index a1b1815..bfd815c 100644
--- a/tests/test-utils.c
+++ b/tests/test-utils.c
@@ -18,6 +18,7 @@
 #undef NDEBUG
 #include <config.h>
 #include <assert.h>
+#include <string.h>
 
 #include <common/utils.h>