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-rw-r--r--src/mbgl/style/expression/let.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mbgl/style/expression/let.cpp b/src/mbgl/style/expression/let.cpp
index 5acd52f578..029c800ef1 100644
--- a/src/mbgl/style/expression/let.cpp
+++ b/src/mbgl/style/expression/let.cpp
@@ -69,7 +69,7 @@ ParseResult Let::parse(const Convertible& value, ParsingContext& ctx) {
mbgl::Value Let::serialize() const {
std::vector<mbgl::Value> serialized;
serialized.emplace_back(getOperator());
- for (auto entry : bindings) {
+ for (const auto& entry : bindings) {
serialized.emplace_back(entry.first);
serialized.emplace_back(entry.second->serialize());
}