diff --git a/include/ntconf.h b/include/ntconf.h
index c95c7ad23..53d58ce95 100644
--- a/include/ntconf.h
+++ b/include/ntconf.h
@@ -86,9 +86,6 @@ extern void FDECL(interject, (int));
 # ifndef _CRT_SECURE_NO_DEPRECATE
 #define _CRT_SECURE_NO_DEPRECATE
 # endif
-# ifndef _CRT_SECURE_NO_DEPRECATE
-#define _CRT_SECURE_NO_DEPRECATE
-# endif
 # ifndef _SCL_SECURE_NO_DEPRECATE
 #define _SCL_SECURE_NO_DEPRECATE
 # endif
diff --git a/win/win32/winMS.h b/win/win32/winMS.h
index e29480c29..04b42beb5 100644
--- a/win/win32/winMS.h
+++ b/win/win32/winMS.h
@@ -11,9 +11,6 @@
 #  ifndef _CRT_SECURE_NO_DEPRECATE
 #define _CRT_SECURE_NO_DEPRECATE
 #  endif
-#  ifndef _CRT_SECURE_NO_DEPRECATE
-#define _CRT_SECURE_NO_DEPRECATE
-#  endif
 #  ifndef _SCL_SECURE_NO_DEPRECATE
 #define _SCL_SECURE_NO_DEPRECATE
 #  endif