diff --git a/scripts/sch3.gd b/scripts/sch3.gd
index 30ce567..faf1369 100644
--- a/scripts/sch3.gd
+++ b/scripts/sch3.gd
@@ -101,7 +101,7 @@ class Sch3 extends unit.Unit:
             emit_signal(code, base_addr, data)
             if not online:
                 online = true
-                emit_signal('line_changed', online)
+                emit_signal('line_changed', self)
                 step_fsm = Sch3Fsm.READ_INPUT
                 tick_fsm_delta = request_period
         else: