1 files changed, 2 insertions, 1 deletions
diff --git a/src/math/random.c b/src/math/random.c
index 44bdb27..94197fe 100644
--- a/src/math/random.c
+++ b/src/math/random.c
@@ -2,6 +2,7 @@
  * ecgen, tool for generating Elliptic curve domain parameters
  * Copyright (C) 2017 J08nY
  */
+#define _POSIX_C_SOURCE 200809L
 #include "random.h"
 #include <time.h>
 
@@ -57,4 +58,4 @@ GEN random_int(long bits) {
 	gel(range, 2) = powis(gen_2, bits);
 
 	return gerepilecopy(ltop, genrand(range));
-}
-\ No newline at end of file
+}