diff --git a/src/util/misc.js b/src/util/misc.js
index 6dc8d8615c..b6f1c8c96f 100644
--- a/src/util/misc.js
+++ b/src/util/misc.js
@@ -6,7 +6,7 @@ export function bind(f) {
 export function copyObj(obj, target, overwrite) {
   if (!target) target = {}
   for (let prop in obj)
-    if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
+    if (Object.prototype.hasOwnProperty.call(obj, prop) && (overwrite !== false || !Object.prototype.hasOwnProperty.call(target, prop)))
       target[prop] = obj[prop]
   return target
 }