diff --git a/include/boost/regex/v4/match_results.hpp b/include/boost/regex/v4/match_results.hpp
index 0874ef6a..72538fc0 100644
--- a/include/boost/regex/v4/match_results.hpp
+++ b/include/boost/regex/v4/match_results.hpp
@@ -23,8 +23,6 @@
 #  include BOOST_ABI_PREFIX
 #endif
 
-#include <algorithm>               // std::swap
-
 namespace boost{
 #ifdef BOOST_MSVC
 #pragma warning(push)
diff --git a/include/boost/regex/v4/regex_workaround.hpp b/include/boost/regex/v4/regex_workaround.hpp
index c8a2fa09..090bcd2e 100644
--- a/include/boost/regex/v4/regex_workaround.hpp
+++ b/include/boost/regex/v4/regex_workaround.hpp
@@ -28,6 +28,7 @@
 #include <string>
 #include <stdexcept>
 #include <iterator>
+#include <algorithm>
 #include <iosfwd>
 #include <vector>
 #include <map>