diff --git a/include/libtorrent/lazy_entry.hpp b/include/libtorrent/lazy_entry.hpp
index 8a9f09b3a..1ee907dae 100644
--- a/include/libtorrent/lazy_entry.hpp
+++ b/include/libtorrent/lazy_entry.hpp
@@ -37,6 +37,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <vector>
 #include <string>
 #include <cstring>
+#include <algorithm>
 #include "libtorrent/config.hpp"
 #include "libtorrent/assert.hpp"
 #include "libtorrent/error_code.hpp"