diff --git a/crypto/ec/curve448/word.h b/crypto/ec/curve448/word.h
index 7d47a58c327edb23e3690f8c95b8d22d9d0c3fcb..cbb1368c299e6ab82a122f0b9e5221580fef970e 100644
--- a/crypto/ec/curve448/word.h
+++ b/crypto/ec/curve448/word.h
@@ -20,15 +20,6 @@
 # include "arch_intrinsics.h"
 
 # include "curve448utils.h"
-
-# ifndef _BSD_SOURCE
-#  define _BSD_SOURCE 1
-# endif
-
-# ifndef _DEFAULT_SOURCE
-#  define _DEFAULT_SOURCE 1
-# endif
-
 # include <stdlib.h>
 
 # if defined(__ARM_NEON__)