diff --git a/test/io_test.cpp b/test/io_test.cpp
index c50b961..380acd0 100644
--- a/test/io_test.cpp
+++ b/test/io_test.cpp
@@ -19,8 +19,6 @@
 #include <sstream>
 #endif
 
-#include "boost/config.hpp"
-
 using namespace std;
 using namespace boost;