1 files changed, 5 insertions, 0 deletions
diff --git a/platform/android/src/run_loop_impl.hpp b/platform/android/src/run_loop_impl.hpp
index c6a1b23a7b..8f0a07f8ba 100644
--- a/platform/android/src/run_loop_impl.hpp
+++ b/platform/android/src/run_loop_impl.hpp
@@ -9,12 +9,15 @@
 #include <list>
 #include <memory>
 #include <mutex>
+#include <unordered_map>
 
 struct ALooper;
 
 namespace mbgl {
 namespace util {
 
+using WatchCallback = std::function<void(int, RunLoop::Event)>;
+
 template <typename T> class Thread;
 class Alarm;
 
@@ -43,6 +46,8 @@ public:
     std::atomic<bool> running;
     std::atomic_flag coalesce = ATOMIC_FLAG_INIT;
 
+    std::unordered_map<int, WatchCallback> readPoll;
+
 private:
     friend RunLoop;