diff --git a/common.py b/common.py
index 51cbd90f1df..1c939e0e245 100644
--- a/common.py
+++ b/common.py
@@ -157,6 +157,7 @@ def generate(env):
 			# http://msdn2.microsoft.com/en-us/library/6dwk3a1z.aspx,
 			'WIN32_LEAN_AND_MEAN',
 			'VC_EXTRALEAN', 
+			'_CRT_SECURE_NO_DEPRECATE',
 		]
 		if debug:
 			cppdefines += ['_DEBUG']