diff --git a/indra/newview/llviewermessage.cpp b/indra/newview/llviewermessage.cpp
index f55edd76b076fa5e073b8a25b86c1f42b25e2819..ab35df1101c8cb1abeae22dbe0a65f987ce0a63b 100644
--- a/indra/newview/llviewermessage.cpp
+++ b/indra/newview/llviewermessage.cpp
@@ -116,6 +116,11 @@
 
 #include "llnotificationmanager.h" //
 
+#if LL_MSVC
+// disable boost::lexical_cast warning
+#pragma warning (disable:4702)
+#endif
+
 //
 // Constants
 //