diff --git a/Nmakefile b/Nmakefile
index 1edc14199d..d0b543d7ab 100755
--- a/Nmakefile
+++ b/Nmakefile
@@ -1,7 +1,7 @@
 !IF DEFINED(PLATFORM)
 
 LINK_FLAGS = /nologo shell32.lib
-CL_FLAGS = /nologo /O2 /W3
+CL_FLAGS = /nologo /O2 /W3 /D_CRT_SECURE_NO_WARNINGS
 
 !IF DEFINED(DEBUG)
 LINK_FLAGS = $(LINK_FLAGS) /DEBUG