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-rw-r--r--src/mbgl/style/expression/length.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mbgl/style/expression/length.cpp b/src/mbgl/style/expression/length.cpp
index f1b58d7952..340a2debea 100644
--- a/src/mbgl/style/expression/length.cpp
+++ b/src/mbgl/style/expression/length.cpp
@@ -12,7 +12,7 @@ Length::Length(std::unique_ptr<Expression> input_)
}
EvaluationResult Length::evaluate(const EvaluationContext& params) const {
- const EvaluationResult value = input->evaluate(params);
+ EvaluationResult value = input->evaluate(params);
if (!value) return value;
return value->match(
[] (const std::string& s) {