1 files changed, 4 insertions, 3 deletions
diff --git a/src/mbgl/sprite/sprite_loader_observer.hpp b/src/mbgl/sprite/sprite_loader_observer.hpp
index c730549c2c..3846d069f0 100644
--- a/src/mbgl/sprite/sprite_loader_observer.hpp
+++ b/src/mbgl/sprite/sprite_loader_observer.hpp
@@ -1,7 +1,9 @@
 #pragma once
 
+#include <mbgl/style/image.hpp>
+#include <mbgl/util/immutable.hpp>
+
 #include <exception>
-#include <memory>
 #include <vector>
 
 namespace mbgl {
@@ -13,8 +15,7 @@ class Image;
 class SpriteLoaderObserver {
 public:
     virtual ~SpriteLoaderObserver() = default;
-
-    virtual void onSpriteLoaded(std::vector<std::unique_ptr<style::Image>>&&) {}
+    virtual void onSpriteLoaded(std::vector<Immutable<style::Image::Impl>>) {}
     virtual void onSpriteError(std::exception_ptr) {}
 };