diff --git a/src/aare/daq/daq.py b/src/aare/daq/daq.py
index 24846c6d..dcd14e5c 100644
--- a/src/aare/daq/daq.py
+++ b/src/aare/daq/daq.py
@@ -549,7 +549,7 @@ class AareDAQ:
             step_size: int = 15,
             face_min_ratio: float = 0.3,
             report_error: bool = True,
-    ):
+    ) -> FaceDetectionResult:
         """
         Execute face detection sequence through the face detection service.