diff --git a/libtorrent/src/escape_string.cpp b/libtorrent/src/escape_string.cpp
index 533b95634..40384e760 100755
--- a/libtorrent/src/escape_string.cpp
+++ b/libtorrent/src/escape_string.cpp
@@ -40,6 +40,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <algorithm>
 #include <iostream>
 #include <limits>
+#include <cstring>
 
 #include <boost/optional.hpp>
 #include <boost/array.hpp>