diff --git a/src/peer_connection.cpp b/src/peer_connection.cpp
index 33ca36c37a79ca2347b0e1dde8eb019bbfc502b1..d6fa400ed711ec3e9ba3514b97144d0e26b1b070 100644
--- a/src/peer_connection.cpp
+++ b/src/peer_connection.cpp
@@ -86,8 +86,6 @@ init_crt(gnutls_session_t session, dht::crypto::Certificate& crt)
 
 using lock = std::lock_guard<std::mutex>;
 
-static constexpr std::size_t IO_BUFFER_SIZE {8192}; ///< Size of char buffer used by IO operations
-
 //==============================================================================
 
 IceSocketEndpoint::IceSocketEndpoint(std::shared_ptr<IceTransport> ice, bool isSender)