diff --git a/scanslicer/controller_detection.py b/scanslicer/controller_detection.py
index 9b858e3..c0023c6 100644
--- a/scanslicer/controller_detection.py
+++ b/scanslicer/controller_detection.py
@@ -33,3 +33,10 @@ class DetectionTask(QRunnable):
         except Exception as exc:
             details = f"{exc}\n\n{traceback.format_exc()}"
             self.signals.failed.emit(details)
+
+
+# AutotuneTaskSignals: class definition for ScanSlicer behavior.
+class AutotuneTaskSignals(QObject):
+    status = Signal(str)
+    finished = Signal(object)
+    failed = Signal(str)