diff --git a/test/range.cpp b/test/range.cpp
index 67a02ba9..00cef73b 100644
--- a/test/range.cpp
+++ b/test/range.cpp
@@ -5,6 +5,7 @@
 #include "../range.hpp"
 
 using namespace std;
+using namespace util;
 
 int
 main (int, char **) {