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-rw-r--r--include/mbgl/actor/mailbox.hpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/mbgl/actor/mailbox.hpp b/include/mbgl/actor/mailbox.hpp
index 1e18d593d3..86ea0100fc 100644
--- a/include/mbgl/actor/mailbox.hpp
+++ b/include/mbgl/actor/mailbox.hpp
@@ -36,7 +36,7 @@ public:
void push(std::unique_ptr<Message>);
void receive();
- static void maybeReceive(std::weak_ptr<Mailbox>);
+ static void maybeReceive(const std::weak_ptr<Mailbox>&);
static std::function<void()> makeClosure(std::weak_ptr<Mailbox>);
private: