diff --git a/lib/libnv/tests/dnv_tests.cc b/lib/libnv/tests/dnv_tests.cc
index fe80d00f4851..a21a91dfa187 100644
--- a/lib/libnv/tests/dnv_tests.cc
+++ b/lib/libnv/tests/dnv_tests.cc
@@ -27,6 +27,7 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include <sys/types.h>
 #include <sys/dnv.h>
 #include <sys/nv.h>