diff --git a/Core/project.lua b/Core/project.lua
index 22a224a..d32e93b 100644
--- a/Core/project.lua
+++ b/Core/project.lua
@@ -167,6 +167,8 @@ local function configureProjectCPUTarget()
         buildoptions { "-march=ivybridge" }
         defines {"AURORA_RUNTIME_MEMSET=__builtin_memset"}
         defines {"AURORA_RUNTIME_MEMCPY=__builtin_memcpy"}
+        defines {"AURORA_RUNTIME_MEMSET_=1"}
+        defines {"AURORA_RUNTIME_MEMCPY_=1"}
     filter {}
 
     filter { "toolset:clang", "architecture:x86"}
@@ -174,6 +176,8 @@ local function configureProjectCPUTarget()
         buildoptions { "-march=core2" }
         defines {"AURORA_RUNTIME_MEMSET=__builtin_memset"}
         defines {"AURORA_RUNTIME_MEMCPY=__builtin_memcpy"}
+        defines {"AURORA_RUNTIME_MEMSET_=1"}
+        defines {"AURORA_RUNTIME_MEMCPY_=1"}
     filter {}
 end