diff --git a/include/boost/iterator/zip_iterator.hpp b/include/boost/iterator/zip_iterator.hpp
index 72ab9a3..817bbab 100755
--- a/include/boost/iterator/zip_iterator.hpp
+++ b/include/boost/iterator/zip_iterator.hpp
@@ -19,6 +19,7 @@
 // Borland 5.5.1 (broken due to lack of support from Boost.Tuples)
 
 #ifndef BOOST_ZIP_ITERATOR_TMB_07_13_2003_HPP_
+# define BOOST_ZIP_ITERATOR_TMB_07_13_2003_HPP_
 
 #include <stddef.h>
 #include <boost/iterator.hpp>
diff --git a/test/zip_iterator_test.cpp b/test/zip_iterator_test.cpp
index 9561f83..943a47d 100755
--- a/test/zip_iterator_test.cpp
+++ b/test/zip_iterator_test.cpp
@@ -42,6 +42,7 @@
 /////////////////////////////////////////////////////////////////////////////
 
 #include <boost/iterator/zip_iterator.hpp>
+#include <boost/iterator/zip_iterator.hpp> // 2nd #include tests #include guard.
 #include <iostream>
 #include <vector>
 #include <list>