diff --git a/src/node/addon/src/moch/premiumize.js b/src/node/addon/src/moch/premiumize.js
index e458600..4abcae3 100644
--- a/src/node/addon/src/moch/premiumize.js
+++ b/src/node/addon/src/moch/premiumize.js
@@ -32,7 +32,7 @@ async function _getCachedStreams(PM, apiKey, streams) {
             const fileName = streamTitleParts[streamTitleParts.length - 1];
             const fileIndex = streamTitleParts.length === 2 ? stream.fileIdx : null;
             const encodedFileName = encodeURIComponent(fileName);
-            mochStreams[stream.infoHash] = {
+            mochStreams[`${stream.infoHash}@${stream.fileIdx}`] = {
               url: `${apiKey}/${stream.infoHash}/${encodedFileName}/${fileIndex}`,
               cached: available?.response[index]
             };