diff --git a/indra/cmake/00-Common.cmake b/indra/cmake/00-Common.cmake
index 25a1b05d8ec2cd7a3b9ef2c962c6f49073753340..15b827b217d9f96abac1085d4a640aaf819fa8d8 100644
--- a/indra/cmake/00-Common.cmake
+++ b/indra/cmake/00-Common.cmake
@@ -7,10 +7,10 @@ include(Variables)
 # Portable compilation flags.
 set(CMAKE_CXX_FLAGS_DEBUG "-D_DEBUG -DLL_DEBUG=1")
 set(CMAKE_CXX_FLAGS_RELEASE
-    "-DLL_RELEASE=1 -DLL_RELEASE_FOR_DOWNLOAD=1 -D_SECURE_SCL=0 -DNDEBUG") 
+    "-DLL_RELEASE=1 -DLL_RELEASE_FOR_DOWNLOAD=1 -DNDEBUG") 
 
 set(CMAKE_CXX_FLAGS_RELWITHDEBINFO 
-    "-DLL_RELEASE=1 -D_SECURE_SCL=0 -DNDEBUG -DLL_RELEASE_WITH_DEBUG_INFO=1")
+    "-DLL_RELEASE=1 -DNDEBUG -DLL_RELEASE_WITH_DEBUG_INFO=1")
 
 # Configure crash reporting
 set(RELEASE_CRASH_REPORTING OFF CACHE BOOL "Enable use of crash reporting in release builds")
@@ -36,13 +36,13 @@ if (WINDOWS)
   # Don't build DLLs.
   set(BUILD_SHARED_LIBS OFF)
 
-  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Od /Zi /MDd /MP"
+  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Od /Zi /MDd /MP -D_SCL_SECURE_NO_WARNINGS=1"
       CACHE STRING "C++ compiler debug options" FORCE)
   set(CMAKE_CXX_FLAGS_RELWITHDEBINFO 
-      "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /Od /Zi /MD /MP /Ob2"
+      "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /Od /Zi /MD /MP /Ob2 -D_SECURE_STL=0"
       CACHE STRING "C++ compiler release-with-debug options" FORCE)
   set(CMAKE_CXX_FLAGS_RELEASE
-      "${CMAKE_CXX_FLAGS_RELEASE} ${LL_CXX_FLAGS} /O2 /Zi /MD /MP /Ob2"
+      "${CMAKE_CXX_FLAGS_RELEASE} ${LL_CXX_FLAGS} /O2 /Zi /MD /MP /Ob2 -D_SECURE_STL=0 -D_HAS_ITERATOR_DEBUGGING=0"
       CACHE STRING "C++ compiler release options" FORCE)
 
   set(CMAKE_CXX_STANDARD_LIBRARIES "")
@@ -59,18 +59,9 @@ if (WINDOWS)
       /Zc:forScope
       /nologo
       /Oy-
-      )
-     
-  if(MSVC)
-    set(CMAKE_CXX_FLAGS_RELEASE
-      "${CMAKE_CXX_FLAGS_RELEASE} -D_SECURE_STL=0 -D_HAS_ITERATOR_DEBUGGING=0"
-      CACHE STRING "C++ compiler release options" FORCE)
-   
-    add_definitions(
       /Zc:wchar_t-
       )
-  endif (MSVC)
-  
+     
   # Are we using the crummy Visual Studio KDU build workaround?
   if (NOT VS_DISABLE_FATAL_WARNINGS)
     add_definitions(/WX)