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-rw-r--r--include/mbgl/renderer/renderer.hpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/mbgl/renderer/renderer.hpp b/include/mbgl/renderer/renderer.hpp
index c209e03045..083102acbe 100644
--- a/include/mbgl/renderer/renderer.hpp
+++ b/include/mbgl/renderer/renderer.hpp
@@ -26,7 +26,7 @@ class Renderer {
public:
Renderer(RendererBackend&, float pixelRatio_, FileSource&, Scheduler&,
GLContextMode = GLContextMode::Unique,
- const optional<std::string> programCacheDir = optional<std::string>());
+ const optional<std::string> programCacheDir = {});
~Renderer();
void setObserver(RendererObserver*);