diff --git a/src/servers/sapphire_zone/ServerZone.cpp b/src/servers/sapphire_zone/ServerZone.cpp
index 13e5a524..ac9658c4 100644
--- a/src/servers/sapphire_zone/ServerZone.cpp
+++ b/src/servers/sapphire_zone/ServerZone.cpp
@@ -30,6 +30,7 @@
 
 #include <boost/make_shared.hpp>
 #include <boost/lexical_cast.hpp>
+#include <boost/algorithm/string/case_conv.hpp>
 #include <thread>
 
 #include "Framework.h"