diff --git a/internal/multiplex/switchboard.go b/internal/multiplex/switchboard.go
index ed9819d..ae596e8 100644
--- a/internal/multiplex/switchboard.go
+++ b/internal/multiplex/switchboard.go
@@ -94,7 +94,7 @@ func (sb *switchboard) send(data []byte, connId *uint32) (n int, err error) {
 			if err != nil {
 				return 0, errBrokenSwitchboard
 			}
-			connId = &newConnId
+			*connId = newConnId
 			return writeAndRegUsage(conn, data)
 		}
 	default: