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-rw-r--r--js/src/builtin/Utilities.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/js/src/builtin/Utilities.js b/js/src/builtin/Utilities.js
index ec5c88336..d5f233d05 100644
--- a/js/src/builtin/Utilities.js
+++ b/js/src/builtin/Utilities.js
@@ -254,7 +254,7 @@ function CopyDataProperties(target, source, excluded) {
// We abbreviate this by calling propertyIsEnumerable which is faster
// and returns false for not defined properties.
- if (!callFunction(std_Object_hasOwnProperty, key, excluded) && callFunction(std_Object_propertyIsEnumerable, source, key))
+ if (!callFunction(std_Object_hasOwnProperty, excluded, key) && callFunction(std_Object_propertyIsEnumerable, source, key))
_DefineDataProperty(target, key, source[key]);
}