musl - musl - an implementation of the standard library for Linux-based systems

diff --git a/src/math/j0f.c b/src/math/j0f.c
index 4b0ee3b7..45883dc4 100644
--- a/src/math/j0f.c
+++ b/src/math/j0f.c

@@ -13,6 +13,7 @@

* ====================================================

*/

+#define _GNU_SOURCE

#include "libm.h"

static float pzerof(float), qzerof(float);