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-rw-r--r--libmpcodecs/ad_hwac3.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libmpcodecs/ad_hwac3.c b/libmpcodecs/ad_hwac3.c
index 95f072212c..2fc6848d53 100644
--- a/libmpcodecs/ad_hwac3.c
+++ b/libmpcodecs/ad_hwac3.c
@@ -5,6 +5,7 @@
(see http://www.dtek.chalmers.se/~dvd/)
*/
+#define _XOPEN_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>