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-rw-r--r--src/mbgl/text/local_glyph_rasterizer.hpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mbgl/text/local_glyph_rasterizer.hpp b/src/mbgl/text/local_glyph_rasterizer.hpp
index 82b16b534d..4582aab103 100644
--- a/src/mbgl/text/local_glyph_rasterizer.hpp
+++ b/src/mbgl/text/local_glyph_rasterizer.hpp
@@ -33,7 +33,7 @@ namespace mbgl {
class LocalGlyphRasterizer {
public:
virtual ~LocalGlyphRasterizer();
- LocalGlyphRasterizer(const optional<std::string> fontFamily = optional<std::string>());
+ LocalGlyphRasterizer(const optional<std::string>& fontFamily = optional<std::string>());
// virtual so that test harness can override platform-specific behavior
virtual bool canRasterizeGlyph(const FontStack&, GlyphID);