diff --git a/pkg/sdp/sdp.go b/pkg/sdp/sdp.go
index 9fac1be4..d645c4fc 100644
--- a/pkg/sdp/sdp.go
+++ b/pkg/sdp/sdp.go
@@ -99,9 +99,12 @@ func (s *SessionDescription) unmarshalOrigin(value string) error {
 
 	var sessionID uint64
 	var err error
-	if strings.HasPrefix(fields[1], "0x") {
-		sessionID, err = strconv.ParseUint(fields[1][len("0x"):], 16, 64)
-	} else {
+	switch {
+	case strings.HasPrefix(fields[1], "0x") || strings.HasPrefix(fields[1], "0X"):
+		sessionID, err = strconv.ParseUint(fields[1][2:], 16, 64)
+	case strings.ContainsAny(fields[1], "abcdefABCDEF"):
+		sessionID, err = strconv.ParseUint(fields[1], 16, 64)
+	default:
 		sessionID, err = strconv.ParseUint(fields[1], 10, 64)
 	}
 	if err != nil {
diff --git a/pkg/sdp/sdp_test.go b/pkg/sdp/sdp_test.go
index 91c58b0f..b65100b4 100644
--- a/pkg/sdp/sdp_test.go
+++ b/pkg/sdp/sdp_test.go
@@ -1382,6 +1382,68 @@ var cases = []struct {
 			},
 		},
 	},
+	{
+		"hex session id for 0XAC4EC96E",
+		[]byte("v=0\r\n" +
+			"o=jdoe 0XAC4EC96E 2890842807 IN IP4 10.47.16.5\r\n" +
+			"s=SDP Seminar\r\n" +
+			"i=A Seminar on the session description protocol\r\n" +
+			"t=3034423619 3042462419\r\n"),
+		[]byte("v=0\r\n" +
+			"o=jdoe 2890844526 2890842807 IN IP4 10.47.16.5\r\n" +
+			"s=SDP Seminar\r\n" +
+			"i=A Seminar on the session description protocol\r\n" +
+			"t=3034423619 3042462419\r\n"),
+		SessionDescription{
+			Origin: psdp.Origin{
+				Username:       "jdoe",
+				SessionID:      2890844526,
+				SessionVersion: 2890842807,
+				NetworkType:    "IN",
+				AddressType:    "IP4",
+				UnicastAddress: "10.47.16.5",
+			},
+			SessionName: "SDP Seminar",
+			SessionInformation: func() *psdp.Information {
+				v := psdp.Information("A Seminar on the session description protocol")
+				return &v
+			}(),
+			TimeDescriptions: []psdp.TimeDescription{
+				{psdp.Timing{3034423619, 3042462419}, nil},
+			},
+		},
+	},
+	{
+		"hex session id for 103bdb6f",
+		[]byte("v=0\r\n" +
+			"o=jdoe 103bdb6f 2890842807 IN IP4 10.47.16.5\r\n" +
+			"s=SDP Seminar\r\n" +
+			"i=A Seminar on the session description protocol\r\n" +
+			"t=3034423619 3042462419\r\n"),
+		[]byte("v=0\r\n" +
+			"o=jdoe 272358255 2890842807 IN IP4 10.47.16.5\r\n" +
+			"s=SDP Seminar\r\n" +
+			"i=A Seminar on the session description protocol\r\n" +
+			"t=3034423619 3042462419\r\n"),
+		SessionDescription{
+			Origin: psdp.Origin{
+				Username:       "jdoe",
+				SessionID:      272358255,
+				SessionVersion: 2890842807,
+				NetworkType:    "IN",
+				AddressType:    "IP4",
+				UnicastAddress: "10.47.16.5",
+			},
+			SessionName: "SDP Seminar",
+			SessionInformation: func() *psdp.Information {
+				v := psdp.Information("A Seminar on the session description protocol")
+				return &v
+			}(),
+			TimeDescriptions: []psdp.TimeDescription{
+				{psdp.Timing{3034423619, 3042462419}, nil},
+			},
+		},
+	},
 }
 
 func TestUnmarshal(t *testing.T) {