diff --git a/indra/newview/lluserauth.cpp b/indra/newview/lluserauth.cpp
index 501c9ac7e..173d66240 100644
--- a/indra/newview/lluserauth.cpp
+++ b/indra/newview/lluserauth.cpp
@@ -133,6 +133,7 @@ void LLUserAuth::authenticate(
 	XMLRPC_VectorAppendString(params, "version", gCurrentVersion.c_str(), 0); // Includes channel name
 	XMLRPC_VectorAppendString(params, "channel", gVersionChannel, 0);
 	XMLRPC_VectorAppendString(params, "platform", PLATFORM_STRING, 0);
+	XMLRPC_VectorAppendString(params, "platform_version", LLAppViewer::instance()->getOSInfo().getOSVersionString().c_str(), 0);
 
 	XMLRPC_VectorAppendString(params, "mac", hashed_mac.c_str(), 0);
 	// A bit of security through obscurity: id0 is volume_serial
@@ -232,6 +233,7 @@ void LLUserAuth::authenticate(
 #endif
 	XMLRPC_VectorAppendString(params, "channel", chan.c_str(), 0);
 	XMLRPC_VectorAppendString(params, "platform", PLATFORM_STRING, 0);
+	XMLRPC_VectorAppendString(params, "platform_version", LLAppViewer::instance()->getOSInfo().getOSVersionString().c_str(), 0);
 
 	XMLRPC_VectorAppendString(params, "mac", hashed_mac.c_str(), 0);
 	// A bit of security through obscurity: id0 is volume_serial