diff --git a/indra/newview/llappviewerwin32.cpp b/indra/newview/llappviewerwin32.cpp
index 54689ea808a6ed40e4987394e971b6822edcfc71..6396ca91ffa6521c4fb597ed6c439d6d23ba52a4 100644
--- a/indra/newview/llappviewerwin32.cpp
+++ b/indra/newview/llappviewerwin32.cpp
@@ -26,12 +26,6 @@
 
 #include "llviewerprecompiledheaders.h"
 
-#if defined(_DEBUG)
-# if _MSC_VER >= 1400 // Visual C++ 2005 or later
-#	define WINDOWS_CRT_MEM_CHECKS 1
-# endif
-#endif
-
 #include "llappviewerwin32.h"
 
 #include "llmemtype.h"