diff --git a/websocketpp/transport/iostream/connection.hpp b/websocketpp/transport/iostream/connection.hpp
index 7a92d27ecd..26bd8fd466 100644
--- a/websocketpp/transport/iostream/connection.hpp
+++ b/websocketpp/transport/iostream/connection.hpp
@@ -30,6 +30,7 @@
 
 #include <websocketpp/common/memory.hpp>
 #include <websocketpp/common/connection_hdl.hpp>
+#include <websocketpp/logger/basic.hpp>
 
 #include <websocketpp/transport/base/connection.hpp>
 #include <websocketpp/transport/iostream/base.hpp>