diff --git a/string/test/regex_test.cpp b/string/test/regex_test.cpp
index 7eb440b..c0a0a45 100644
--- a/string/test/regex_test.cpp
+++ b/string/test/regex_test.cpp
@@ -14,6 +14,7 @@
 #include <vector>
 #include <iostream>
 #include <boost/regex.hpp>
+#include <boost/algorithm/string/sequence_traits.hpp>
 #include <boost/algorithm/string/regex.hpp>
 #include <boost/test/test_tools.hpp>
 
diff --git a/string/test/replace_test.cpp b/string/test/replace_test.cpp
index a17e3e3..998fe66 100644
--- a/string/test/replace_test.cpp
+++ b/string/test/replace_test.cpp
@@ -15,10 +15,10 @@
 #include <list>
 #include <iostream>
 
-#include <boost/algorithm/string/replace.hpp>
-#include <boost/algorithm/string/erase.hpp>
 #include <boost/algorithm/string/std/list_traits.hpp>
 #include <boost/algorithm/string/std/string_traits.hpp>
+#include <boost/algorithm/string/replace.hpp>
+#include <boost/algorithm/string/erase.hpp>
 
 // equals predicate is used for result comparison
 #include <boost/algorithm/string/predicate.hpp>