diff --git a/scanslicer/controller_detection.py b/scanslicer/controller_detection.py
index 28846e4..bc07fc4 100644
--- a/scanslicer/controller_detection.py
+++ b/scanslicer/controller_detection.py
@@ -7,3 +7,7 @@ from PySide6.QtWidgets import QMessageBox
 
 
 # DetectionTaskSignals: class definition for ScanSlicer behavior.
+class DetectionTaskSignals(QObject):
+    status = Signal(str)
+    finished = Signal(object, object, object)
+    failed = Signal(str)