diff --git a/lib/plugins/validators/async/21_checkContentType.js b/lib/plugins/validators/async/21_checkContentType.js
index 1a756470b..79bd38606 100644
--- a/lib/plugins/validators/async/21_checkContentType.js
+++ b/lib/plugins/validators/async/21_checkContentType.js
@@ -125,7 +125,7 @@ export default {
 
                 if ((data.type == CONFIG.T.stream_apple_mpegurl || data.type == CONFIG.T.stream_x_mpegurl) 
                     && data.allow_origin !== '*' 
-                    && (!data.request_origin && !data.allow_origin || data.allow_origin?.indexOf(data.request_origin) == -1)) {
+                    && (!data.request_origin || !data.allow_origin || data.allow_origin.indexOf(data.request_origin) === -1)) {
                     link.error = 'CORS headers on the player are not configured correctly';
                 }