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-rwxr-xr-xchannels/chan_sip.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 5080395b5..6f3151f9f 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -2094,6 +2094,7 @@ static struct cfalias {
{ "To", "t" },
{ "Supported", "k" },
{ "Refer-To", "r" },
+ { "Referred-By", "b" },
{ "Allow-Events", "u" },
{ "Event", "o" },
{ "Via", "v" },