diff --git a/voip/java/android/net/rtp/AudioStream.java b/voip/java/android/net/rtp/AudioStream.java
index d761214d3fd08..b7874f753fde1 100644
--- a/voip/java/android/net/rtp/AudioStream.java
+++ b/voip/java/android/net/rtp/AudioStream.java
@@ -158,7 +158,7 @@ public class AudioStream extends RtpStream {
             if (type < 96 || type > 127) {
                 throw new IllegalArgumentException("Invalid type");
             }
-            if (type == mCodec.type) {
+            if (mCodec != null && type == mCodec.type) {
                 throw new IllegalArgumentException("The type is used by codec");
             }
         }