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-rw-r--r--include/mbgl/style/expression/formatted.hpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/mbgl/style/expression/formatted.hpp b/include/mbgl/style/expression/formatted.hpp
index 28964de941..02e2f7c3d0 100644
--- a/include/mbgl/style/expression/formatted.hpp
+++ b/include/mbgl/style/expression/formatted.hpp
@@ -23,7 +23,7 @@ optional<FormattedSectionID> toFormattedSectionID(const Variant& variant) {
return variant.match(
[] (double t) -> FormattedSectionID { return t; },
[] (const std::string& t) -> FormattedSectionID { return t;},
- [] (auto&) -> optional<FormattedSectionID> { return nullopt; });
+ [] (const auto&) -> optional<FormattedSectionID> { return nullopt; });
}
struct FormattedSection {