diff --git a/indra/llcommon/llsys.cpp b/indra/llcommon/llsys.cpp
index 92fdf4f327f7958b39ed8668e221726f50df7782..156c78b1e802f3b00cdbd8aaf7ac4f0d762bf2d2 100644
--- a/indra/llcommon/llsys.cpp
+++ b/indra/llcommon/llsys.cpp
@@ -24,6 +24,10 @@
  * $/LicenseInfo$
  */
 
+#if LL_WINDOWS
+#pragma warning (disable : 4355) // 'this' used in initializer list: yes, intentionally
+#endif
+
 #include "linden_common.h"
 
 #include "llsys.h"