1 files changed, 2 insertions, 2 deletions
diff --git a/src/qml/jsruntime/qv4arrayobject.cpp b/src/qml/jsruntime/qv4arrayobject.cpp
index d5b3b8a651..fbd757a829 100644
--- a/src/qml/jsruntime/qv4arrayobject.cpp
+++ b/src/qml/jsruntime/qv4arrayobject.cpp
@@ -371,7 +371,7 @@ ReturnedValue ArrayPrototype::method_shift(CallContext *ctx)
 
     ScopedValue result(scope);
 
-    if (!instance->protoHasArray() && !instance->arrayData->hasAttributes() && instance->arrayData->length() <= len) {
+    if (!instance->protoHasArray() && !instance->arrayData->hasAttributes() && instance->arrayData->length() <= len && instance->arrayData->type != ArrayData::Custom) {
         result = instance->arrayData->vtable()->pop_front(instance.getPointer());
     } else {
         result = instance->getIndexed(0);
@@ -550,7 +550,7 @@ ReturnedValue ArrayPrototype::method_unshift(CallContext *ctx)
 
     uint len = instance->getLength();
 
-    if (!instance->protoHasArray() && !instance->arrayData->hasAttributes() && instance->arrayData->length() <= len) {
+    if (!instance->protoHasArray() && !instance->arrayData->hasAttributes() && instance->arrayData->length() <= len && instance->arrayData->type != ArrayData::Custom) {
         instance->arrayData->vtable()->push_front(instance.getPointer(), ctx->callData->args, ctx->callData->argc);
     } else {
         ScopedValue v(scope);