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-rw-r--r--src/qml/jsruntime/qv4objectproto.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/qml/jsruntime/qv4objectproto.cpp b/src/qml/jsruntime/qv4objectproto.cpp
index 72b2816dd9..84238477fd 100644
--- a/src/qml/jsruntime/qv4objectproto.cpp
+++ b/src/qml/jsruntime/qv4objectproto.cpp
@@ -401,7 +401,7 @@ ReturnedValue ObjectPrototype::method_preventExtensions(const FunctionObject *b,
if (!o)
return argv[0].asReturnedValue();
- o->setInternalClass(o->internalClass()->nonExtensible());
+ o->preventExtensions();
return o.asReturnedValue();
}