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-rw-r--r--libavformat/udp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libavformat/udp.c b/libavformat/udp.c
index 9b1e1128a1..d5a48be3fa 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -21,6 +21,7 @@
#include "avformat.h"
#include <unistd.h>
#include "network.h"
+#include "os_support.h"
#ifndef IPV6_ADD_MEMBERSHIP
#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP