diff --git a/ext/shout2/gstshout2.c b/ext/shout2/gstshout2.c
index 2198050f5c..ee6a6baccc 100644
--- a/ext/shout2/gstshout2.c
+++ b/ext/shout2/gstshout2.c
@@ -70,7 +70,7 @@ enum
 #define DEFAULT_PROTOCOL     SHOUT2SEND_PROTOCOL_HTTP
 
 #ifdef SHOUT_FORMAT_WEBM
-#define WEBM_CAPS "; video/webm"
+#define WEBM_CAPS "; video/webm; audio/webm"
 #else
 #define WEBM_CAPS ""
 #endif