diff --git a/main/rtp.c b/main/rtp.c
index 0794fbcde6..874f8ddb24 100644
--- a/main/rtp.c
+++ b/main/rtp.c
@@ -1624,7 +1624,9 @@ static struct {
 	{{1, AST_FORMAT_G723_1}, "audio", "G723"},
 	{{1, AST_FORMAT_GSM}, "audio", "GSM"},
 	{{1, AST_FORMAT_ULAW}, "audio", "PCMU"},
+	{{1, AST_FORMAT_ULAW}, "audio", "G711U"},
 	{{1, AST_FORMAT_ALAW}, "audio", "PCMA"},
+	{{1, AST_FORMAT_ALAW}, "audio", "G711A"},
 	{{1, AST_FORMAT_G726}, "audio", "G726-32"},
 	{{1, AST_FORMAT_ADPCM}, "audio", "DVI4"},
 	{{1, AST_FORMAT_SLINEAR}, "audio", "L16"},