1 files changed, 1 insertions, 1 deletions
diff --git a/gr-blocks/lib/tcp_server_sink_impl.h b/gr-blocks/lib/tcp_server_sink_impl.h
index edc445de5a..d9b996b069 100644
--- a/gr-blocks/lib/tcp_server_sink_impl.h
+++ b/gr-blocks/lib/tcp_server_sink_impl.h
@@ -22,7 +22,7 @@ namespace blocks {
 class tcp_server_sink_impl : public tcp_server_sink
 {
 private:
-    size_t d_itemsize;
+    const size_t d_itemsize;
 
     boost::asio::io_service d_io_service;
     gr::thread::thread d_io_serv_thread;