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-rw-r--r--src/mbgl/renderer/painter.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mbgl/renderer/painter.cpp b/src/mbgl/renderer/painter.cpp
index eed3bfcd8b..da4903864b 100644
--- a/src/mbgl/renderer/painter.cpp
+++ b/src/mbgl/renderer/painter.cpp
@@ -93,7 +93,7 @@ static gl::VertexVector<ExtrusionTextureLayoutVertex> extrusionTextureVertices()
Painter::Painter(gl::Context& context_,
const TransformState& state_,
float pixelRatio,
- const std::string& programCacheDir)
+ const optional<std::string>& programCacheDir)
: context(context_),
state(state_),
tileVertexBuffer(context.createVertexBuffer(tileVertices())),