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-rw-r--r--include/mbgl/actor/actor.hpp6
1 files changed, 1 insertions, 5 deletions
diff --git a/include/mbgl/actor/actor.hpp b/include/mbgl/actor/actor.hpp
index f87f191b73..4d8c0ab404 100644
--- a/include/mbgl/actor/actor.hpp
+++ b/include/mbgl/actor/actor.hpp
@@ -8,14 +8,10 @@
#include <memory>
#include <future>
#include <type_traits>
+#include <cassert>
namespace mbgl {
-namespace util {
- template <typename O>
- class Thread;
-}
-
/*
An `Actor<O>` is an owning reference to an asynchronous object of type `O`: an "actor".
Communication with an actor happens via message passing: you send a message to the object