1 files changed, 1 insertions, 1 deletions
diff --git a/src/qml/jsruntime/qv4argumentsobject.cpp b/src/qml/jsruntime/qv4argumentsobject.cpp
index d3ca573a2e..2f5d811611 100644
--- a/src/qml/jsruntime/qv4argumentsobject.cpp
+++ b/src/qml/jsruntime/qv4argumentsobject.cpp
@@ -133,7 +133,7 @@ bool ArgumentsObject::defineOwnProperty(ExecutionEngine *engine, uint index, con
         mapAttrs = arrayData()->attributes(index);
         arrayData()->getProperty(index, map, &mapAttrs);
         setArrayAttributes(index, Attr_Data);
-        ArrayData::Index arrayIndex{ arrayData(), arrayData()->mappedIndex(index) };
+        PropertyIndex arrayIndex{ arrayData(), arrayData()->values.values + arrayData()->mappedIndex(index) };
         arrayIndex.set(scope.engine, d()->mappedArguments->values[index]);
     }