diff --git a/libavformat/sdp.c b/libavformat/sdp.c
index cf83e60710..f9c05823f2 100644
--- a/libavformat/sdp.c
+++ b/libavformat/sdp.c
@@ -56,7 +56,7 @@ static void dest_write(char *buff, int size, const char *dest_addr, int ttl)
 static void sdp_write_header(char *buff, int size, struct sdp_session_level *s)
 {
     av_strlcatf(buff, size, "v=%d\r\n"
-                            "o=- %d %d IN IPV4 %s\r\n"
+                            "o=- %d %d IN IP4 %s\r\n"
                             "t=%d %d\r\n"
                             "s=%s\r\n"
                             "a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n",