diff --git a/mobile/lib/face/model/box.dart b/mobile/lib/face/model/box.dart
index dafe3d838..73d7dea38 100644
--- a/mobile/lib/face/model/box.dart
+++ b/mobile/lib/face/model/box.dart
@@ -41,23 +41,3 @@ class FaceBox {
         'height': height,
       };
 }
-
-/// Bounding box of a face.
-///
-/// [xMin] and [yMin] are the coordinates of the top left corner of the box, and
-/// [width] and [height] are the width and height of the box.
-///
-/// One unit is equal to one pixel in the original image.
-class FaceBoxImage {
-  final int xMin;
-  final int yMin;
-  final int width;
-  final int height;
-
-  FaceBoxImage({
-    required this.xMin,
-    required this.yMin,
-    required this.width,
-    required this.height,
-  });
-}
diff --git a/mobile/lib/utils/face/face_util.dart b/mobile/lib/utils/face/face_util.dart
index b41765791..17b198667 100644
--- a/mobile/lib/utils/face/face_util.dart
+++ b/mobile/lib/utils/face/face_util.dart
@@ -7,6 +7,26 @@ import "package:image/image.dart" as img;
 import "package:logging/logging.dart";
 import "package:photos/face/model/box.dart";
 
+/// Bounding box of a face.
+///
+/// [xMin] and [yMin] are the coordinates of the top left corner of the box, and
+/// [width] and [height] are the width and height of the box.
+///
+/// One unit is equal to one pixel in the original image.
+class FaceBoxImage {
+  final int xMin;
+  final int yMin;
+  final int width;
+  final int height;
+
+  FaceBoxImage({
+    required this.xMin,
+    required this.yMin,
+    required this.width,
+    required this.height,
+  });
+}
+
 final _logger = Logger("FaceUtil");
 final _computer = Computer.shared();
 const _faceImageBufferFactor = 0.2;