diff --git a/src/main/java/org/phlo/AirReceiver/RaopAudioHandler.java b/src/main/java/org/phlo/AirReceiver/RaopAudioHandler.java
index 754455a..7894f78 100644
--- a/src/main/java/org/phlo/AirReceiver/RaopAudioHandler.java
+++ b/src/main/java/org/phlo/AirReceiver/RaopAudioHandler.java
@@ -298,7 +298,7 @@ else if (RaopRtspMethods.GET_PARAMETER.equals(method)) {
 	 * <li> {@code <attribute>=aesiv} 
 	 * </ul>
 	 */
-	private static Pattern s_pattern_sdp_a = Pattern.compile("^([a-z]+):(.*)$");
+	private static Pattern s_pattern_sdp_a = Pattern.compile("^([a-z\\-]+):(.*)$");
 	
 	/**
 	 * SDP {@code a} attribute {@code rtpmap}. Format is