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-rw-r--r--oox/source/drawingml/diagram/diagram.cxx2
1 files changed, 1 insertions, 1 deletions
diff --git a/oox/source/drawingml/diagram/diagram.cxx b/oox/source/drawingml/diagram/diagram.cxx
index fb1fc916c349..678299ea3abd 100644
--- a/oox/source/drawingml/diagram/diagram.cxx
+++ b/oox/source/drawingml/diagram/diagram.cxx
@@ -214,7 +214,7 @@ static void sortChildrenByZOrder(const ShapePtr& pShape)
[](const ShapePtr& a, const ShapePtr& b) { return a->getZOrder() < b->getZOrder(); });
// Apply also for children.
- for (auto& rChild : rChildren)
+ for (const auto& rChild : rChildren)
sortChildrenByZOrder(rChild);
}