diff --git a/lib/utils.js b/lib/utils.js
index cc97b10..42e0cd1 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -16,7 +16,8 @@ const validateCallUpdate = (opts) => {
     whisper,
     conf_hold_status,
     sip_request,
-    dub
+    dub,
+    media_path
   } = opts;
 
   assert.ok(call_hook || child_call_hook || call_status ||
@@ -32,6 +33,9 @@ const validateCallUpdate = (opts) => {
   if (conf_hold_status) assert.ok(['hold', 'unhold'].includes(conf_hold_status),
     `invalid mute_status: ${mute_status}, must be 'mute' or 'unmute'`);
 
+  if (media_path) assert.ok(['no-media', 'partial-media', 'full-media'].includes(media_path),
+    `invalid media_path: ${media_path}, must be 'no-media', 'partial-media' or 'full-media'`);
+
   if (whisper) assert.ok(whisper.verb,
     `invalid whisper: ${JSON.stringify(whisper)}, must  be a 'play' or 'say' verb`);