diff --git a/indra/newview/lllogininstance.cpp b/indra/newview/lllogininstance.cpp
index bef0ac9058d0e2062f5dd906239096671ed99d0a..bacd88e0e0b5e1ad15014ade8710d9f4c9428fbc 100644
--- a/indra/newview/lllogininstance.cpp
+++ b/indra/newview/lllogininstance.cpp
@@ -59,6 +59,7 @@
 #include "llupdaterservice.h"
 #include "llevents.h"
 #include "llappviewer.h"
+#include "llsdserialize.h"
 
 #include <boost/scoped_ptr.hpp>
 #include <sstream>