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-rw-r--r--node/SocketManager.hpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/node/SocketManager.hpp b/node/SocketManager.hpp
index 29cc94bf..b2cfb776 100644
--- a/node/SocketManager.hpp
+++ b/node/SocketManager.hpp
@@ -91,7 +91,7 @@ public:
virtual void poll(
unsigned long timeout,
void (*handler)(const SharedPtr<Socket> &,void *,const InetAddress &,Buffer<ZT_SOCKET_MAX_MESSAGE_LEN> &),
- void *arg);
+ void *arg) = 0;
/**
* Cause current or next blocking poll() operation to timeout immediately