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-rw-r--r--include/mbgl/renderer/renderer_observer.hpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/mbgl/renderer/renderer_observer.hpp b/include/mbgl/renderer/renderer_observer.hpp
index e0fc84215e..5d5a7bb5fe 100644
--- a/include/mbgl/renderer/renderer_observer.hpp
+++ b/include/mbgl/renderer/renderer_observer.hpp
@@ -34,7 +34,7 @@ public:
// Style is missing an image
using StyleImageMissingCallback = std::function<void()>;
- virtual void onStyleImageMissing(const std::string&, StyleImageMissingCallback done) { done(); }
+ virtual void onStyleImageMissing(const std::string&, const StyleImageMissingCallback& done) { done(); }
virtual void onRemoveUnusedStyleImages(const std::vector<std::string>&) {}
};