1 files changed, 8 insertions, 0 deletions
diff --git a/src/mbgl/annotation/annotation_source.hpp b/src/mbgl/annotation/annotation_source.hpp
index e8d3b43e09..db9221788f 100644
--- a/src/mbgl/annotation/annotation_source.hpp
+++ b/src/mbgl/annotation/annotation_source.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <mbgl/style/source.hpp>
+#include <mbgl/style/source_impl.hpp>
 
 namespace mbgl {
 
@@ -8,6 +9,13 @@ class AnnotationSource : public style::Source {
 public:
     AnnotationSource();
 
+    class Impl;
+};
+
+class AnnotationSource::Impl : public style::Source::Impl {
+public:
+    Impl(Source&);
+
     void load(FileSource&) final;
 
 private: