diff --git a/ffmpeg.c b/ffmpeg.c
index 31e9a0e158..c64100c7af 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -20,7 +20,7 @@
  */
 
 /* needed for usleep() */
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 600
 
 #include "config.h"
 #include <ctype.h>
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index e56b9870a5..155978744a 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -26,7 +26,7 @@
  */
 
 /* needed for mkstemp() */
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 600
 
 #include "libavutil/integer.h"
 #include "libavutil/crc.h"
diff --git a/libavformat/rtpdec.c b/libavformat/rtpdec.c
index 9fb06ee5ab..119682041d 100644
--- a/libavformat/rtpdec.c
+++ b/libavformat/rtpdec.c
@@ -20,7 +20,7 @@
  */
 
 /* needed for gethostname() */
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 600
 
 #include "libavcodec/bitstream.h"
 #include "avformat.h"