diff --git a/changelog.md b/changelog.md
index f7cc10eb3f..f2399d1112 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,4 +1,5 @@
 HEAD
+- Add missing locale include. Thank you Toninoso for reporting this. #281
 - Refactors `asio_transport` endpoint and adds full documentation and exception
   free varients of all methods.
 - Removes `asio_transport` endpoint method cancel(). Use `stop_listen()` instead
diff --git a/websocketpp/utilities.hpp b/websocketpp/utilities.hpp
index d5ad902dd3..07745661a7 100644
--- a/websocketpp/utilities.hpp
+++ b/websocketpp/utilities.hpp
@@ -32,6 +32,7 @@
 
 #include <algorithm>
 #include <string>
+#include <locale>
 
 namespace websocketpp {
 /// Generic non-websocket specific utility functions and data structures