diff --git a/build/premake/premake4.lua b/build/premake/premake4.lua
index b36d9296f0..69d25ec5cd 100644
--- a/build/premake/premake4.lua
+++ b/build/premake/premake4.lua
@@ -659,6 +659,8 @@ function setup_all_libs ()
 			"spidermonkey",
 			"boost",
 			"gloox",
+			"icu",
+			"iconv",
 			"tinygettext"
 		}
 		setup_static_lib_project("lobby", source_dirs, extern_libs, {})
diff --git a/source/scriptinterface/ScriptRuntime.h b/source/scriptinterface/ScriptRuntime.h
index 345607d045..bfb67ba8c9 100644
--- a/source/scriptinterface/ScriptRuntime.h
+++ b/source/scriptinterface/ScriptRuntime.h
@@ -18,6 +18,7 @@
 #ifndef INCLUDED_SCRIPTRUNTIME
 #define INCLUDED_SCRIPTRUNTIME
 
+#include <sstream>
 #include <boost/flyweight.hpp>
 #include <boost/flyweight/key_value.hpp>
 #include <boost/flyweight/no_locking.hpp>