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-rw-r--r--ext/mixed/js/audio.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/mixed/js/audio.js b/ext/mixed/js/audio.js
index 4e9d04fa..7d5ffedd 100644
--- a/ext/mixed/js/audio.js
+++ b/ext/mixed/js/audio.js
@@ -113,7 +113,7 @@ function audioGetFromUrl(url, willDownload) {
async function audioGetFromSources(expression, sources, optionsContext, willDownload, cache=null) {
const key = `${expression.expression}:${expression.reading}`;
- if (cache !== null && cache.hasOwnProperty(expression)) {
+ if (cache !== null && hasOwn(cache, expression)) {
return cache[key];
}